/* ============================================================
   VEGMANAGE ERP - Main Application Stylesheet
   Vegetarian Kitchen ERP System
   Version: 1.0.0
   ============================================================ */

/* ============================================================
   1. CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================================ */
:root {
    /* --- Brand Colors (Green Theme) --- */
    --color-primary-50:  #ecfdf5;
    --color-primary-100: #d1fae5;
    --color-primary-200: #a7f3d0;
    --color-primary-300: #6ee7b7;
    --color-primary-400: #34d399;
    --color-primary-500: #10b981;
    --color-primary-600: #059669;
    --color-primary-700: #047857;
    --color-primary-800: #065f46;
    --color-primary-900: #064e3b;

    /* --- Neutral Colors --- */
    --color-gray-50:  #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* --- Semantic Colors --- */
    --color-success:  #10b981;
    --color-danger:   #ef4444;
    --color-warning:  #f59e0b;
    --color-info:     #3b82f6;
    --color-purple:   #8b5cf6;
    --color-amber:    #f59e0b;
    --color-emerald:  #059669;

    /* --- Semantic Backgrounds --- */
    --color-success-bg:  #ecfdf5;
    --color-danger-bg:   #fef2f2;
    --color-warning-bg:  #fffbeb;
    --color-info-bg:     #eff6ff;
    --color-purple-bg:   #f5f3ff;

    /* --- Layout --- */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --topbar-height: 64px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-active-bg: rgba(16, 185, 129, 0.15);
    --sidebar-active-text: #34d399;
    --content-bg: #f1f5f9;

    /* --- Typography --- */
    --font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
        Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
    --font-size-xs:   0.75rem;
    --font-size-sm:   0.875rem;
    --font-size-base: 1rem;
    --font-size-lg:   1.125rem;
    --font-size-xl:   1.25rem;
    --font-size-2xl:  1.5rem;
    --font-size-3xl:  1.875rem;

    /* --- Spacing --- */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;

    /* --- Borders & Radius --- */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* --- Shadows --- */
    --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md:  0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg:  0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl:  0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* --- Transitions --- */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* --- Z-index --- */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    --z-toast: 700;
}


/* ============================================================
   2. RESET / NORMALIZE
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--content-bg);
    min-height: 100vh;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-700);
    text-decoration: underline;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
}

input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
}

table {
    border-collapse: collapse;
    width: 100%;
}

hr {
    border: none;
    border-top: 1px solid var(--color-gray-200);
    margin: var(--spacing-6) 0;
}


/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-3);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-gray-600);
}

small {
    font-size: var(--font-size-sm);
}

.text-muted {
    color: var(--color-gray-500);
}

.text-mono {
    font-family: var(--font-mono);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: 0;
}


/* ============================================================
   4. LAYOUT - SIDEBAR
   ============================================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar Container --- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
    transition: width var(--transition-base), transform var(--transition-base);
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-600) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: var(--color-gray-600);
    border-radius: var(--radius-full);
}

/* --- Sidebar Logo / Brand --- */
.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-5) var(--spacing-5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: var(--topbar-height);
    flex-shrink: 0;
}

.sidebar-brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-400));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.sidebar-brand-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #ffffff;
    white-space: nowrap;
}

.sidebar-brand-text span {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--color-gray-400);
    margin-top: 2px;
}

/* --- Sidebar Navigation --- */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-4) 0;
}

.sidebar-nav-section {
    margin-bottom: var(--spacing-4);
}

.sidebar-nav-label {
    display: block;
    padding: var(--spacing-2) var(--spacing-5);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    white-space: nowrap;
}

.sidebar-nav-item {
    position: relative;
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-2) var(--spacing-5);
    color: var(--sidebar-text);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    white-space: nowrap;
    text-decoration: none;
}

.sidebar-nav-link:hover {
    color: #e2e8f0;
    background-color: rgba(255, 255, 255, 0.05);
    text-decoration: none;
}

.sidebar-nav-link.active {
    color: var(--sidebar-active-text);
    background-color: var(--sidebar-active-bg);
    border-left-color: var(--color-primary-500);
}

.sidebar-nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

.sidebar-nav-text {
    flex: 1;
}

.sidebar-nav-badge {
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary-600);
    color: #ffffff;
    font-weight: 600;
    line-height: 1;
}

/* --- Sidebar Sub-Menu --- */
.sidebar-nav-arrow {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
    margin-left: auto;
}

.sidebar-nav-item.open > .sidebar-nav-link .sidebar-nav-arrow {
    transform: rotate(90deg);
}

.sidebar-submenu {
    display: none;
    padding-left: var(--spacing-8);
    overflow: hidden;
}

.sidebar-nav-item.open > .sidebar-submenu {
    display: block;
}

.sidebar-submenu .sidebar-nav-link {
    padding: var(--spacing-1) var(--spacing-5);
    font-size: var(--font-size-sm);
    border-left: none;
}

.sidebar-submenu .sidebar-nav-link::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background-color: var(--color-gray-600);
    flex-shrink: 0;
    transition: background-color var(--transition-fast);
}

.sidebar-submenu .sidebar-nav-link:hover::before,
.sidebar-submenu .sidebar-nav-link.active::before {
    background-color: var(--color-primary-400);
}

/* --- Sidebar User Info --- */
.sidebar-user {
    padding: var(--spacing-4) var(--spacing-5);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex-shrink: 0;
}

.sidebar-user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-300));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #ffffff;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #e2e8f0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* --- Sidebar Overlay (Mobile) --- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
}


/* ============================================================
   5. LAYOUT - MAIN CONTENT AREA
   ============================================================ */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-base);
}

.content-wrapper {
    flex: 1;
    padding: var(--spacing-6);
}


/* ============================================================
   6. TOPBAR
   ============================================================ */
.topbar {
    position: sticky;
    top: 0;
    height: var(--topbar-height);
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-xs);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-6);
    z-index: var(--z-sticky);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.topbar-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    border-radius: var(--radius-lg);
    color: var(--color-gray-600);
    transition: background-color var(--transition-fast);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.topbar-toggle:hover {
    background-color: var(--color-gray-100);
}

.hamburger-line {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-gray-600);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
}

/* --- Topbar Search --- */
.topbar-search {
    position: relative;
    width: 320px;
}

.topbar-search-icon {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    pointer-events: none;
}

.topbar-search input {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-4) var(--spacing-2) var(--spacing-10);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background-color: var(--color-gray-50);
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    transition: all var(--transition-fast);
    outline: none;
}

.search-btn {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    padding: 0;
    margin: 0;
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
}

.topbar-search input::placeholder {
    color: var(--color-gray-400);
}

.topbar-search input:focus {
    background-color: #ffffff;
    border-color: var(--color-primary-400);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* --- Topbar Right Actions --- */
.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.topbar-action-btn {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    color: var(--color-gray-500);
    font-size: 1.125rem;
    transition: all var(--transition-fast);
}

.topbar-action-btn:hover {
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
}

.topbar-action-btn .badge-dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background-color: var(--color-danger);
    border-radius: var(--radius-full);
    border: 2px solid #ffffff;
}

/* --- Topbar User Dropdown --- */
.topbar-user {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    margin-left: var(--spacing-2);
}

.topbar-user:hover {
    background-color: var(--color-gray-100);
}

.topbar-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-400));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.topbar-user-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
}

.topbar-user-arrow {
    font-size: 0.625rem;
    color: var(--color-gray-400);
}

/* --- Topbar Notification Badge & Dropdown --- */
.topbar-notifications {
    position: relative;
}

.topbar-icon-btn {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    transition: background-color var(--transition-fast);
}

.topbar-icon-btn:hover {
    background-color: var(--color-gray-100);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: var(--radius-full);
    background-color: var(--color-danger);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    line-height: 18px;
    text-align: center;
    border: 2px solid #fff;
}

.notification-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 360px;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-200);
    z-index: 1000;
    overflow: hidden;
}

.notification-dropdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-100);
}

.notification-dropdown-header .btn-link {
    background: none;
    border: none;
    color: var(--color-primary-600);
    cursor: pointer;
    font-size: var(--font-size-sm);
    padding: 0;
}

.notification-dropdown-body {
    max-height: 320px;
    overflow-y: auto;
}

.notification-dropdown-empty {
    padding: var(--spacing-6) var(--spacing-4);
    text-align: center;
    color: var(--color-gray-400);
}

.notification-dropdown-item {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-50);
    text-decoration: none;
    color: inherit;
    transition: background-color var(--transition-fast);
}

.notification-dropdown-item:hover {
    background-color: var(--color-gray-50);
}

.notification-dropdown-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.notification-dropdown-content {
    flex: 1;
    min-width: 0;
}

.notification-dropdown-title {
    font-weight: 500;
    font-size: var(--font-size-sm);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.notification-dropdown-msg {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin: 2px 0 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.notification-dropdown-time {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.notification-dropdown-footer {
    padding: var(--spacing-2) var(--spacing-4);
    text-align: center;
    border-top: 1px solid var(--color-gray-100);
}

.notification-dropdown-footer a {
    font-size: var(--font-size-sm);
    color: var(--color-primary-600);
    text-decoration: none;
    font-weight: 500;
}

.notification-dropdown-footer a:hover {
    text-decoration: underline;
}

/* ============================================================
   7. BREADCRUMBS
   ============================================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-1);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    color: var(--color-gray-500);
}

.breadcrumb-item a {
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--color-primary-600);
    text-decoration: none;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: '/';
    margin-right: var(--spacing-1);
    color: var(--color-gray-300);
}

.breadcrumb-item.active {
    color: var(--color-gray-800);
    font-weight: 500;
}


/* ============================================================
   8. CARDS
   ============================================================ */
.card {
    background-color: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-100);
    margin-bottom: var(--spacing-6);
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--color-gray-100);
}

.card-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 0;
}

.card-body {
    padding: var(--spacing-5);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-5);
    border-top: 1px solid var(--color-gray-100);
    background-color: var(--color-gray-50);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}


/* ============================================================
   9. TABLES
   ============================================================ */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table thead th {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    background-color: var(--color-gray-50);
    border-bottom: 2px solid var(--color-gray-200);
    white-space: nowrap;
}

.table tbody td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--color-gray-700);
    vertical-align: middle;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* Striped rows */
.table-striped tbody tr:nth-child(even) {
    background-color: var(--color-gray-50);
}

/* Hover effect */
.table-hover tbody tr {
    transition: background-color var(--transition-fast);
}

.table-hover tbody tr:hover {
    background-color: var(--color-primary-50);
}

/* Compact table */
.table-compact thead th,
.table-compact tbody td {
    padding: var(--spacing-2) var(--spacing-3);
}


/* ============================================================
   10. BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    user-select: none;
}

.btn:hover {
    text-decoration: none;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* --- Button Variants --- */
.btn-primary {
    background-color: var(--color-primary-600);
    color: #ffffff;
    border-color: var(--color-primary-600);
}

.btn-primary:hover {
    background-color: var(--color-primary-700);
    border-color: var(--color-primary-700);
    color: #ffffff;
}

.btn-primary:active {
    background-color: var(--color-primary-800);
}

.btn-secondary {
    background-color: var(--color-gray-500);
    color: #ffffff;
    border-color: var(--color-gray-500);
}

.btn-secondary:hover {
    background-color: var(--color-gray-600);
    border-color: var(--color-gray-600);
    color: #ffffff;
}

.btn-danger {
    background-color: var(--color-danger);
    color: #ffffff;
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background-color: #dc2626;
    border-color: #dc2626;
    color: #ffffff;
}

.btn-warning {
    background-color: var(--color-warning);
    color: #ffffff;
    border-color: var(--color-warning);
}

.btn-warning:hover {
    background-color: #d97706;
    border-color: #d97706;
    color: #ffffff;
}

.btn-info {
    background-color: var(--color-info);
    color: #ffffff;
    border-color: var(--color-info);
}

.btn-info:hover {
    background-color: #2563eb;
    border-color: #2563eb;
    color: #ffffff;
}

.btn-success {
    background-color: var(--color-success);
    color: #ffffff;
    border-color: var(--color-success);
}

.btn-success:hover {
    background-color: var(--color-primary-700);
    border-color: var(--color-primary-700);
    color: #ffffff;
}

.btn-light {
    background-color: #ffffff;
    color: var(--color-gray-700);
    border-color: var(--color-gray-200);
}

.btn-light:hover {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-300);
}

/* --- Outline Variants --- */
.btn-outline-primary {
    background-color: transparent;
    color: var(--color-primary-600);
    border-color: var(--color-primary-600);
}

.btn-outline-primary:hover {
    background-color: var(--color-primary-600);
    color: #ffffff;
}

.btn-outline-secondary {
    background-color: transparent;
    color: var(--color-gray-500);
    border-color: var(--color-gray-300);
}

.btn-outline-secondary:hover {
    background-color: var(--color-gray-500);
    color: #ffffff;
}

.btn-outline-danger {
    background-color: transparent;
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-outline-danger:hover {
    background-color: var(--color-danger);
    color: #ffffff;
}

.btn-outline-warning {
    background-color: transparent;
    color: var(--color-warning);
    border-color: var(--color-warning);
}

.btn-outline-warning:hover {
    background-color: var(--color-warning);
    color: #ffffff;
}

.btn-outline-info {
    background-color: transparent;
    color: var(--color-info);
    border-color: var(--color-info);
}

.btn-outline-info:hover {
    background-color: var(--color-info);
    color: #ffffff;
}

/* --- Button Sizes --- */
.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-md);
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
}

/* --- Button Group --- */
.btn-group {
    display: inline-flex;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.btn-group .btn + .btn {
    margin-left: -1px;
}

/* --- Icon Button --- */
.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-lg);
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

.btn-icon.btn-lg {
    width: 44px;
    height: 44px;
}


/* ============================================================
   11. FORMS
   ============================================================ */
.form-group {
    margin-bottom: var(--spacing-5);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-1);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    background-color: #ffffff;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    line-height: 1.5;
}

.form-control::placeholder {
    color: var(--color-gray-400);
}

.form-control:focus {
    border-color: var(--color-primary-400);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--color-gray-100);
    cursor: not-allowed;
    opacity: 0.7;
}

/* --- Select --- */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23475569' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 14px 10px;
    padding-right: 2.5rem;
}

/* --- Textarea --- */
textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* --- Form Sizes --- */
.form-control-sm {
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
}

.form-control-lg {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
}

/* --- Help Text --- */
.form-text {
    display: block;
    margin-top: var(--spacing-1);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* --- Validation States --- */
.form-control.is-invalid {
    border-color: var(--color-danger);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.invalid-feedback {
    display: block;
    margin-top: var(--spacing-1);
    font-size: var(--font-size-xs);
    color: var(--color-danger);
}

.form-control.is-valid {
    border-color: var(--color-success);
}

.form-control.is-valid:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* --- Checkbox / Radio --- */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
}

.form-check-input {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary-600);
    cursor: pointer;
    flex-shrink: 0;
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    cursor: pointer;
}

/* --- Input Group --- */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    border-radius: 0;
    flex: 1;
}

.input-group .form-control:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group .form-control:last-child {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.input-group-prepend,
.input-group-append {
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    background-color: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
}

.input-group-prepend {
    border-right: none;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group-append {
    border-left: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* --- Form Row / Inline Forms --- */
.form-row {
    display: flex;
    gap: var(--spacing-4);
}

.form-row .form-group {
    flex: 1;
}

.form-inline {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}


/* ============================================================
   12. BADGES & PILLS
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

/* --- Status Badges --- */
.badge-planning {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.badge-active {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge-on-hold,
.badge-on_hold {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-completed {
    background-color: var(--color-primary-50);
    color: var(--color-emerald);
}

.badge-archived {
    background-color: var(--color-gray-100);
    color: var(--color-gray-500);
}

.badge-todo {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.badge-in-progress,
.badge-in_progress {
    background-color: var(--color-warning-bg);
    color: var(--color-amber);
}

.badge-review {
    background-color: var(--color-purple-bg);
    color: var(--color-purple);
}

.badge-done {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge-cancelled {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

/* --- Priority Badges --- */
.badge-priority-low {
    background-color: var(--color-gray-100);
    color: var(--color-gray-600);
}

.badge-priority-medium {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.badge-priority-high {
    background-color: #fff7ed;
    color: #ea580c;
}

.badge-priority-urgent {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

/* --- Generic Color Badges --- */
.badge-primary {
    background-color: var(--color-primary-100);
    color: var(--color-primary-700);
}

.badge-secondary {
    background-color: var(--color-gray-100);
    color: var(--color-gray-600);
}

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.badge-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

/* --- Dot badge (small indicator) --- */
.badge-dot {
    width: 8px;
    height: 8px;
    padding: 0;
    border-radius: var(--radius-full);
    display: inline-block;
}

.badge-dot-success { background-color: var(--color-success); }
.badge-dot-danger  { background-color: var(--color-danger); }
.badge-dot-warning { background-color: var(--color-warning); }
.badge-dot-info    { background-color: var(--color-info); }


/* ============================================================
   13. ALERTS
   ============================================================ */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
    border: 1px solid transparent;
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    line-height: 1;
    margin-top: 1px;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: var(--spacing-1);
}

.alert-dismiss {
    flex-shrink: 0;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.125rem;
    line-height: 1;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
    padding: 0;
}

.alert-dismiss:hover {
    opacity: 1;
}

.alert-success {
    background-color: var(--color-success-bg);
    border-color: #a7f3d0;
    color: var(--color-primary-800);
}

.alert-error,
.alert-danger {
    background-color: var(--color-danger-bg);
    border-color: #fecaca;
    color: #991b1b;
}

.alert-warning {
    background-color: var(--color-warning-bg);
    border-color: #fde68a;
    color: #92400e;
}

.alert-info {
    background-color: var(--color-info-bg);
    border-color: #bfdbfe;
    color: #1e40af;
}


/* ============================================================
   14. PAGINATION
   ============================================================ */
.pagination {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    list-style: none;
}

.pagination-item {
    display: inline-block;
}

.pagination-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-2);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    background-color: #ffffff;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination-link:hover {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-300);
    color: var(--color-gray-800);
    text-decoration: none;
}

.pagination-link.active {
    background-color: var(--color-primary-600);
    border-color: var(--color-primary-600);
    color: #ffffff;
}

.pagination-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-left: var(--spacing-4);
}


/* ============================================================
   15. MODALS
   ============================================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
    animation: fadeIn var(--transition-base);
}

.modal-backdrop.active {
    display: flex;
}

.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: -1;
}

.modal-content {
    background-color: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    animation: slideUp var(--transition-base);
}

.modal-sm { max-width: 400px; }
.modal-lg { max-width: 720px; }
.modal-xl { max-width: 960px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--color-gray-100);
    flex-shrink: 0;
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 0;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-gray-400);
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--color-gray-100);
    color: var(--color-gray-600);
}

.modal-body {
    padding: var(--spacing-5);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-5);
    border-top: 1px solid var(--color-gray-100);
    flex-shrink: 0;
}


/* ============================================================
   16. DROPDOWN MENUS
   ============================================================ */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: var(--z-dropdown);
    min-width: 200px;
    padding: var(--spacing-2) 0;
    background-color: #ffffff;
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: none;
    animation: fadeIn var(--transition-fast);
}

.dropdown-menu.show {
    display: block;
}

.dropdown-menu-left {
    right: auto;
    left: 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    white-space: nowrap;
    transition: background-color var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
}

.dropdown-item:hover {
    background-color: var(--color-gray-50);
    color: var(--color-gray-900);
    text-decoration: none;
}

.dropdown-item.active {
    background-color: var(--color-primary-50);
    color: var(--color-primary-700);
}

.dropdown-item-danger {
    color: var(--color-danger);
}

.dropdown-item-danger:hover {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.dropdown-divider {
    height: 1px;
    margin: var(--spacing-2) 0;
    background-color: var(--color-gray-100);
}

.dropdown-header {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}


/* ============================================================
   17. TOOLTIPS
   ============================================================ */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    color: #ffffff;
    background-color: var(--color-gray-900);
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    pointer-events: none;
    z-index: var(--z-tooltip);
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

.tooltip-bottom::after {
    bottom: auto;
    top: calc(100% + 6px);
}


/* ============================================================
   18. STATS CARDS (Dashboard Row)
   ============================================================ */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-6);
}

.stat-card {
    background-color: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-100);
    padding: var(--spacing-5);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-card-icon.green  { background-color: var(--color-primary-100); color: var(--color-primary-600); }
.stat-card-icon.blue   { background-color: var(--color-info-bg);     color: var(--color-info); }
.stat-card-icon.amber  { background-color: var(--color-warning-bg);  color: var(--color-warning); }
.stat-card-icon.red    { background-color: var(--color-danger-bg);   color: var(--color-danger); }
.stat-card-icon.purple { background-color: var(--color-purple-bg);   color: var(--color-purple); }

.stat-card-content {
    flex: 1;
    min-width: 0;
}

.stat-card-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.2;
}

.stat-card-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-top: var(--spacing-1);
}

.stat-card-trend {
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-1);
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.stat-card-trend.up   { color: var(--color-success); }
.stat-card-trend.down { color: var(--color-danger); }


/* ============================================================
   19. PROGRESS BARS
   ============================================================ */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-sm { height: 4px; }
.progress-lg { height: 12px; }

.progress-bar {
    height: 100%;
    border-radius: var(--radius-full);
    background-color: var(--color-primary-500);
    transition: width var(--transition-slow);
}

.progress-bar-success { background-color: var(--color-success); }
.progress-bar-danger  { background-color: var(--color-danger); }
.progress-bar-warning { background-color: var(--color-warning); }
.progress-bar-info    { background-color: var(--color-info); }

.progress-labeled {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.progress-labeled .progress {
    flex: 1;
}

.progress-labeled .progress-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    flex-shrink: 0;
    min-width: 36px;
    text-align: right;
}


/* ============================================================
   20. AVATARS
   ============================================================ */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-300));
    color: #ffffff;
    font-weight: 700;
    overflow: hidden;
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-xs { width: 24px; height: 24px; font-size: 0.625rem; }
.avatar-sm { width: 32px; height: 32px; font-size: var(--font-size-xs); }
.avatar-md { width: 40px; height: 40px; font-size: var(--font-size-sm); }
.avatar-lg { width: 48px; height: 48px; font-size: var(--font-size-base); }
.avatar-xl { width: 64px; height: 64px; font-size: var(--font-size-xl); }

.avatar-group {
    display: flex;
}

.avatar-group .avatar {
    border: 2px solid #ffffff;
    margin-left: -8px;
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

/* Avatar color variants */
.avatar-green  { background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-400)); }
.avatar-blue   { background: linear-gradient(135deg, #3b82f6, #60a5fa); }
.avatar-amber  { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.avatar-red    { background: linear-gradient(135deg, #ef4444, #f87171); }
.avatar-purple { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }


/* ============================================================
   21. ANIMATIONS / KEYFRAMES
   ============================================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

.animate-fade-in   { animation: fadeIn var(--transition-base); }
.animate-slide-up  { animation: slideUp var(--transition-base); }
.animate-spin      { animation: spin 1s linear infinite; }
.animate-pulse     { animation: pulse 2s ease-in-out infinite; }


/* ============================================================
   22. UTILITY CLASSES
   ============================================================ */

/* --- Text Alignment --- */
.text-left    { text-align: left; }
.text-center  { text-align: center; }
.text-right   { text-align: right; }

/* --- Text Styles --- */
.text-bold    { font-weight: 700; }
.text-medium  { font-weight: 500; }
.text-normal  { font-weight: 400; }
.text-sm      { font-size: var(--font-size-sm); }
.text-xs      { font-size: var(--font-size-xs); }
.text-lg      { font-size: var(--font-size-lg); }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.05em; }

/* --- Text Colors --- */
.text-primary { color: var(--color-primary-600); }
.text-success { color: var(--color-success); }
.text-danger  { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-info    { color: var(--color-info); }
.text-gray    { color: var(--color-gray-500); }
.text-dark    { color: var(--color-gray-800); }
.text-white   { color: #ffffff; }

/* --- Text Truncation --- */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --- Display --- */
.d-none      { display: none; }
.d-block     { display: block; }
.d-flex      { display: flex; }
.d-inline    { display: inline; }
.d-inline-block { display: inline-block; }
.d-inline-flex  { display: inline-flex; }
.d-grid      { display: grid; }

/* --- Flex Helpers --- */
.flex-row     { flex-direction: row; }
.flex-col     { flex-direction: column; }
.flex-wrap    { flex-wrap: wrap; }
.flex-nowrap  { flex-wrap: nowrap; }
.flex-1       { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start   { align-items: flex-start; }
.items-center  { align-items: center; }
.items-end     { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start   { justify-content: flex-start; }
.justify-center  { justify-content: center; }
.justify-end     { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around  { justify-content: space-around; }

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-5 { gap: var(--spacing-5); }
.gap-6 { gap: var(--spacing-6); }

/* --- Grid --- */
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* --- Margins --- */
.m-0  { margin: 0; }
.m-1  { margin: var(--spacing-1); }
.m-2  { margin: var(--spacing-2); }
.m-3  { margin: var(--spacing-3); }
.m-4  { margin: var(--spacing-4); }
.m-auto { margin: auto; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: var(--spacing-1); }
.ml-2 { margin-left: var(--spacing-2); }
.ml-3 { margin-left: var(--spacing-3); }
.ml-4 { margin-left: var(--spacing-4); }
.ml-auto { margin-left: auto; }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: var(--spacing-1); }
.mr-2 { margin-right: var(--spacing-2); }
.mr-3 { margin-right: var(--spacing-3); }
.mr-4 { margin-right: var(--spacing-4); }
.mr-auto { margin-right: auto; }

/* --- Paddings --- */
.p-0  { padding: 0; }
.p-1  { padding: var(--spacing-1); }
.p-2  { padding: var(--spacing-2); }
.p-3  { padding: var(--spacing-3); }
.p-4  { padding: var(--spacing-4); }
.p-5  { padding: var(--spacing-5); }
.p-6  { padding: var(--spacing-6); }

.pt-0 { padding-top: 0; }
.pt-2 { padding-top: var(--spacing-2); }
.pt-4 { padding-top: var(--spacing-4); }
.pt-6 { padding-top: var(--spacing-6); }

.pb-0 { padding-bottom: 0; }
.pb-2 { padding-bottom: var(--spacing-2); }
.pb-4 { padding-bottom: var(--spacing-4); }
.pb-6 { padding-bottom: var(--spacing-6); }

.pl-0 { padding-left: 0; }
.pl-4 { padding-left: var(--spacing-4); }

.pr-0 { padding-right: 0; }
.pr-4 { padding-right: var(--spacing-4); }

.px-0 { padding-left: 0; padding-right: 0; }
.px-2 { padding-left: var(--spacing-2); padding-right: var(--spacing-2); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.py-6 { padding-top: var(--spacing-6); padding-bottom: var(--spacing-6); }

/* --- Width / Height --- */
.w-full  { width: 100%; }
.w-auto  { width: auto; }
.h-full  { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* --- Overflow --- */
.overflow-hidden { overflow: hidden; }
.overflow-auto   { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }

/* --- Position --- */
.relative { position: relative; }
.absolute { position: absolute; }
.sticky   { position: sticky; }

/* --- Border --- */
.border       { border: 1px solid var(--color-gray-200); }
.border-top   { border-top: 1px solid var(--color-gray-200); }
.border-bottom { border-bottom: 1px solid var(--color-gray-200); }
.border-none  { border: none; }
.rounded      { border-radius: var(--radius-lg); }
.rounded-xl   { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* --- Background --- */
.bg-white   { background-color: #ffffff; }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-primary { background-color: var(--color-primary-600); }

/* --- Cursor --- */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

/* --- Misc --- */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-none { box-shadow: none; }
.list-none { list-style: none; }
.select-none { user-select: none; }


/* ============================================================
   23. EMPTY STATE
   ============================================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-6);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
    opacity: 0.4;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.empty-state-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    max-width: 360px;
    margin: 0 auto var(--spacing-6);
}


/* ============================================================
   24. LOADING / SPINNER
   ============================================================ */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-200);
    border-top-color: var(--color-primary-600);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

.spinner-sm { width: 14px; height: 14px; border-width: 2px; }
.spinner-lg { width: 32px; height: 32px; border-width: 3px; }

.loading-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: inherit;
}


/* ============================================================
   25. TOAST / NOTIFICATION
   ============================================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background-color: #ffffff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--color-gray-300);
    min-width: 320px;
    max-width: 420px;
    animation: slideInLeft var(--transition-base);
}

.toast-success { border-left-color: var(--color-success); }
.toast-error   { border-left-color: var(--color-danger); }
.toast-warning { border-left-color: var(--color-warning); }
.toast-info    { border-left-color: var(--color-info); }


/* ============================================================
   26. TABS
   ============================================================ */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--color-gray-200);
    gap: 0;
    margin-bottom: var(--spacing-5);
}

.tab-link {
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-500);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: none;
    text-decoration: none;
}

.tab-link:hover {
    color: var(--color-gray-700);
    text-decoration: none;
}

.tab-link.active {
    color: var(--color-primary-600);
    border-bottom-color: var(--color-primary-600);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-fast);
}


/* ============================================================
   27. FILTER FORMS
   ============================================================ */
.filter-input {
    width: auto;
    min-width: 120px;
}

.filter-input-wide {
    width: 180px;
}

/* ============================================================
   28. RESPONSIVE BREAKPOINTS
   ============================================================ */

/* --- Tablet (max-width: 1024px) --- */
@media (max-width: 1024px) {
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .topbar-search {
        width: 240px;
    }

    .form-row {
        flex-wrap: wrap;
    }

    .form-row .form-group {
        flex: 1 1 calc(50% - var(--spacing-4));
        min-width: 200px;
    }
}

/* --- Collapsible Sidebar Sections --- */
.nav-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    padding: var(--spacing-2) var(--spacing-5);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    white-space: nowrap;
    transition: color var(--transition-fast);
}

.nav-section-title:hover {
    color: var(--color-gray-300);
}

.nav-section-arrow {
    font-size: 0.65rem;
    transition: transform 0.2s ease;
    display: inline-block;
}

.nav-section.open .nav-section-arrow {
    transform: rotate(180deg);
}

.nav-section .nav-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.nav-section.open .nav-list {
    max-height: 500px;
}

/* --- Mobile (max-width: 768px) --- */
@media (max-width: 768px) {
    /* Sidebar off-screen, slides in */
    .sidebar {
        transform: translateX(-100%);
        z-index: 999;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.active {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    /* Show hamburger on mobile */
    .topbar-toggle {
        display: flex;
    }

    .topbar-search {
        display: none;
    }

    .user-name {
        display: none;
    }

    .content-wrapper {
        padding: var(--spacing-4);
    }

    /* Stats cards: 2 columns on mobile */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.75rem;
    }

    .stats-row {
        grid-template-columns: 1fr;
    }

    .grid-cols-4,
    .grid-cols-3,
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }

    /* Dashboard grid single column */
    .dashboard-grid {
        grid-template-columns: 1fr !important;
    }

    /* Order show 2-col grid → single column */
    .grid-cols-2,
    [style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }

    /* Table horizontal scroll wrapper */
    .card-body {
        overflow-x: auto;
    }

    .table thead th,
    .table tbody td {
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-xs);
        white-space: nowrap;
    }

    /* Forms full width */
    .form-row {
        flex-direction: column;
    }

    .form-row .form-group {
        flex: 1 1 100%;
    }

    .form-inline {
        flex-direction: column;
        align-items: stretch;
    }

    /* Filter form stack on mobile */
    .filter-form {
        flex-direction: column;
    }

    .filter-input,
    .filter-input-wide,
    .filter-form .form-control,
    .filter-form select {
        width: 100% !important;
        min-width: 0;
    }

    .filter-form .btn {
        width: 100%;
    }

    /* Page header stack on mobile */
    .page-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.75rem;
    }

    .page-header .d-flex {
        width: 100%;
        flex-wrap: wrap;
    }

    /* Modals full-width on mobile */
    .modal {
        max-width: 100%;
        margin: var(--spacing-4);
        max-height: calc(100vh - var(--spacing-8));
    }

    /* Buttons stack */
    .btn-group-mobile {
        flex-direction: column;
    }

    /* Pagination compact */
    .pagination {
        flex-wrap: wrap;
    }

    /* Breadcrumb */
    .breadcrumb {
        font-size: var(--font-size-xs);
    }

    /* Notification dropdown full-width on mobile */
    .notification-dropdown {
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        width: 100%;
        border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    }

    /* Flex layout for task show */
    .d-flex.gap-3.flex-wrap {
        flex-direction: column;
    }

    .flex-2, .flex-1 {
        width: 100%;
        flex: none;
    }

    /* Hide on mobile */
    .hide-mobile {
        display: none !important;
    }

    /* Full-width buttons on mobile */
    .form-actions {
        flex-direction: column;
    }
    .form-actions .btn {
        width: 100%;
        text-align: center;
    }
}

/* --- Small Mobile (max-width: 480px) --- */
@media (max-width: 480px) {
    .content-wrapper {
        padding: var(--spacing-3);
    }

    .card-body {
        padding: var(--spacing-3);
    }

    .card-header {
        padding: var(--spacing-3) var(--spacing-3);
        flex-wrap: wrap;
        gap: var(--spacing-2);
    }

    .card-header h2,
    .card-header h3 {
        font-size: var(--font-size-base);
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }

    .topbar {
        padding: 0 var(--spacing-3);
    }

    /* Stats cards single column on very small screens */
    .stats-grid {
        grid-template-columns: 1fr !important;
    }

    .stat-icon {
        width: 42px;
        height: 42px;
    }

    h1 {
        font-size: 1.5rem;
    }

    /* Compact filter bar */
    .filter-form {
        flex-direction: column;
    }
    .filter-form .form-control,
    .filter-form select {
        width: 100%;
    }
}

/* --- Show only on mobile --- */
.show-mobile {
    display: none !important;
}

@media (max-width: 768px) {
    .show-mobile {
        display: block !important;
    }
}

/* --- Print --- */
@media print {
    .sidebar,
    .topbar,
    .sidebar-overlay {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .btn, .pagination {
        display: none !important;
    }
}

/* =========================================================================
   Calendar
   ========================================================================= */

.calendar-sidebar {
    width: 220px;
    flex-shrink: 0;
}

.calendar-toolbar {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.calendar-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: 0;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.cal-header {
    padding: var(--spacing-2);
    text-align: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.cal-header.weekend {
    color: var(--color-danger);
}

.cal-day {
    min-height: 90px;
    padding: var(--spacing-1);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    position: relative;
}

.cal-day:hover {
    background-color: var(--bg-secondary);
}

.cal-day.today {
    background-color: rgba(74, 144, 217, 0.08);
}

.cal-day.today .cal-day-number {
    background-color: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.cal-day.weekend {
    background-color: rgba(0, 0, 0, 0.015);
}

.cal-day.other-month {
    color: var(--text-muted);
    background-color: var(--bg-secondary);
    cursor: default;
}

.cal-day-number {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-1);
}

.cal-event-pill {
    display: block;
    padding: 1px 4px;
    margin-bottom: 2px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 11px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
}

.cal-event-pill:hover {
    opacity: 0.85;
}

.cal-more-link {
    font-size: 11px;
    color: var(--color-primary);
    cursor: pointer;
    padding: 1px 4px;
}

.cal-more-link:hover {
    text-decoration: underline;
}

/* Calendar modal overlay (from JS) */
.modal-overlay#cal-modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay .modal-dialog {
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay .modal-dialog .modal-header,
.modal-overlay .modal-dialog .modal-body {
    padding: var(--spacing-4) var(--spacing-5);
}