:root {
    /* --- Light Mode Variables --- */
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --success-color: #2ec4b6;
    --warning-color: #f9c74f;
    --danger-color: #ef233c;
    --info-color: #4cc9f0;
    
    --bg-body: #f8f9fc;
    --bg-card: #ffffff;
    --bg-nav: #ffffff;
    --bg-input: #f8f9fa;
    --bg-hover: rgba(67, 97, 238, 0.05);
    
    --text-main: #2b2d42;
    --text-muted: #6c757d;
    --text-light: #adb5bd;
    
    --border-color: #e9ecef;
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
    
    --scroll-btn-bg: rgba(255, 255, 255, 0.9);
    --scroll-btn-text: #4361ee;
    
    --invert-icon: 0;
}

/* --- Dark Mode Variables & Configuration --- */
[data-theme="dark"] {
    /* Bootstrap 5.3 Overrides (CRITICAL FOR DARK MODE) */
    --bs-body-bg: #121212;
    --bs-body-color: #e0e0e0;
    --bs-card-bg: #1e1e1e;
    --bs-card-border-color: #333333;
    --bs-border-color: #333333;
    --bs-tertiary-bg: #2d2d2d; /* For inputs/groups */
    
    /* Custom Colors adjustment */
    --primary-color: #4cc9f0;
    --secondary-color: #7209b7;
    --success-color: #4cc9f0;
    --warning-color: #ffd166;
    --danger-color: #ff5c77;
    
    --bg-body: #121212;
    --bg-card: #1e1e1e;
    --bg-nav: #1e1e1e;
    --bg-input: #2d2d2d;
    --bg-hover: rgba(255, 255, 255, 0.05);
    
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-light: #666666;
    
    --border-color: #333333;
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
    
    --scroll-btn-bg: rgba(45, 45, 45, 0.9);
    --scroll-btn-text: #4cc9f0;
    
    --invert-icon: 1;
    
    color-scheme: dark; /* Helps browser native controls (scrollbars, datepickers) */
}

/* =========================================
   DARK MODE COMPATIBILITY FIXES (GLOBAL)
   ========================================= */

/* Override Bootstrap Background Utilities */
[data-theme="dark"] .bg-white { 
    background-color: var(--bg-card) !important; 
    color: var(--text-main) !important; 
}
[data-theme="dark"] .bg-light { 
    background-color: var(--bg-input) !important; 
    color: var(--text-main) !important; 
    border-color: var(--border-color) !important;
}

/* Override Text Colors to prevent invisible text */
[data-theme="dark"] .text-dark { 
    color: #e0e0e0 !important; 
}
[data-theme="dark"] .text-muted { 
    color: #a0a0a0 !important; 
}
[data-theme="dark"] .text-secondary { 
    color: #b0b0b0 !important; 
}

/* Override Borders and Shadows */
[data-theme="dark"] .border, 
[data-theme="dark"] .border-top, 
[data-theme="dark"] .border-bottom, 
[data-theme="dark"] .border-end, 
[data-theme="dark"] .border-start { 
    border-color: var(--border-color) !important; 
}
[data-theme="dark"] .shadow-sm, [data-theme="dark"] .shadow { 
    box-shadow: 0 .125rem .25rem rgba(0,0,0,.5) !important; 
}

/* Fix Input Fields & Selects */
[data-theme="dark"] .form-control, 
[data-theme="dark"] .form-select, 
[data-theme="dark"] .input-group-text {
    background-color: var(--bg-input) !important;
    color: var(--text-main) !important;
    border-color: var(--border-color) !important;
}
[data-theme="dark"] .form-control::placeholder {
    color: var(--text-muted) !important;
    opacity: 0.7;
}
[data-theme="dark"] .form-control:focus, 
[data-theme="dark"] .form-select:focus {
    background-color: #383838 !important;
    color: #ffffff !important;
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 0.25rem rgba(76, 201, 240, 0.15);
}
/* Invert Calendar Icon color */
[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

/* Fix Dropdown Menus */
[data-theme="dark"] .dropdown-menu {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}
[data-theme="dark"] .dropdown-item {
    color: var(--text-main);
}
[data-theme="dark"] .dropdown-item:hover, 
[data-theme="dark"] .dropdown-item:focus {
    background-color: var(--bg-hover);
    color: var(--primary-color);
}
[data-theme="dark"] .dropdown-divider {
    border-top-color: var(--border-color);
}

/* Fix Tables */
[data-theme="dark"] .table {
    --bs-table-color: var(--text-main);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--border-color);
    --bs-table-striped-bg: rgba(255,255,255,0.05);
    --bs-table-hover-bg: rgba(255,255,255,0.08);
    color: var(--text-main);
}
[data-theme="dark"] .table thead th {
    background-color: var(--bg-input);
    color: var(--text-main);
    border-bottom-color: var(--border-color);
}

/* Fix Modals */
[data-theme="dark"] .modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
[data-theme="dark"] .modal-header, 
[data-theme="dark"] .modal-footer {
    border-color: var(--border-color);
}
[data-theme="dark"] .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Fix Specific Components (Winner Card & Badges) */
[data-theme="dark"] .winner-card {
    background: linear-gradient(135deg, #2d2d2d 0%, #1e1e1e 100%);
    border-color: var(--border-color);
}
[data-theme="dark"] .badge.bg-light.text-dark {
    background-color: rgba(255,255,255,0.1) !important;
    color: #fff !important;
    border-color: transparent !important;
}

/* =========================================
   GENERAL STYLES
   ========================================= */

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Prompt', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    background: var(--bg-nav);
    box-shadow: 0 2px 15px rgba(0,0,0,0.03);
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}
.navbar-brand {
    color: var(--primary-color) !important;
    font-weight: 700;
    font-size: 1.35rem;
}
.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
    border-radius: 6px;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary-color) !important;
    background-color: var(--bg-hover);
}
[data-theme="dark"] .nav-link:hover, [data-theme="dark"] .nav-link.active {
    color: #fff !important;
}
.nav-link.active { font-weight: 600; }

/* Cards */
.card {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background-color: var(--bg-card); /* Changed from background to background-color for better override */
    box-shadow: var(--card-shadow);
    color: var(--text-main);
}
.card-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}
.card-body {
    background-color: var(--bg-card);
    color: var(--text-main);
}

/* Forms & Inputs (Base styles) */
.form-control, .form-select, .input-group-text {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.form-control:focus, .form-select:focus {
    background-color: var(--bg-input);
    color: var(--text-main);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.15);
}
.form-control::placeholder { color: var(--text-muted); opacity: 0.7; }
.form-control-plaintext { color: var(--text-main); }

/* Tables (Base styles) */
.table {
    color: var(--text-main);
    --bs-table-color: var(--text-main);
    --bs-table-bg: var(--bg-card);
    --bs-table-border-color: var(--border-color);
    --bs-table-hover-bg: var(--bg-hover);
    --bs-table-striped-bg: var(--bg-input);
}
.table-hover tbody tr:hover {
    background-color: var(--bs-table-hover-bg);
    color: var(--text-main);
}
.table thead th {
    border-bottom-color: var(--border-color);
    color: var(--text-muted);
    background-color: var(--bg-input); 
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}
.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}
.btn-light {
    background-color: var(--bg-input);
    border-color: var(--border-color);
    color: var(--text-main);
}
.btn-light:hover {
    background-color: var(--border-color);
    color: var(--text-main);
}
.btn-white {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-main);
}
.btn-white:hover {
    background-color: var(--bg-input);
    color: var(--text-main);
}
.btn-outline-secondary {
    color: var(--text-muted);
    border-color: var(--border-color);
}
.btn-outline-secondary:hover {
    background-color: var(--bg-input);
    color: var(--text-main);
    border-color: var(--text-muted);
}

/* Modals (Base styles) */
.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.modal-header, .modal-footer {
    border-color: var(--border-color);
    background-color: var(--bg-card);
}
.btn-close {
    filter: invert(var(--invert-icon));
}

/* Dropdowns (Base styles) */
.dropdown-menu {
    background-color: var(--bg-card);
    border-color: var(--border-color);
}
.dropdown-item {
    color: var(--text-main);
}
.dropdown-item:hover {
    background-color: var(--bg-hover);
    color: var(--primary-color);
}
.dropdown-divider {
    border-top-color: var(--border-color);
}

/* Scroll to Top Button */
.scroll-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    border: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}
.scroll-to-top-btn.show {
    opacity: 1;
    visibility: visible;
    bottom: 30px;
}
.scroll-to-top-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    background-color: var(--secondary-color);
}

/* Dark Mode Toggle */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}
.theme-toggle-btn:hover {
    background-color: var(--bg-input);
    color: var(--primary-color);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-body); 
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1; 
    border-radius: 5px;
}
[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #475569; 
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color); 
}

/* Vendor Master Specific */
.vendor-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}
.vendor-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow);
    border-color: transparent;
}
.contact-badge {
    background-color: var(--bg-input);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

/* Project List Specific */
.search-container { position: relative; }
.search-icon {
    position: absolute; left: 15px; top: 50%;
    transform: translateY(-50%); color: var(--text-muted);
}
.form-control-search {
    padding-left: 45px; 
    border-radius: 10px;
    height: 48px;
    background-color: var(--bg-card);
    color: var(--text-main);
    border-color: var(--border-color);
}
.filter-btn {
    border: 1px solid var(--border-color); 
    background: var(--bg-card); 
    color: var(--text-muted);
}
.filter-btn:hover, .filter-btn.active {
    background: var(--primary-color); 
    color: #fff;
    border-color: var(--primary-color);
}
.stat-card {
    background: var(--bg-card); 
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.stat-number { color: var(--text-main); }

/* Quick Action Buttons */
.action-btn {
    transition: all 0.2s ease;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
}
[data-theme="dark"] .action-btn {
    background: rgba(45, 45, 45, 0.8);
    border-color: #444;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1) !important;
    background: #fff;
    border-color: var(--primary-color) !important;
    color: var(--primary-color);
}
[data-theme="dark"] .action-btn:hover {
    background: #333;
    color: #fff;
}

/* AI Typing Indicator Animation */
.typing-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #aaa;
    margin-right: 3px;
    animation: typing 1.4s infinite ease-in-out both;
}
.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* --- Mobile Responsive Adjustments --- */
@media (max-width: 768px) {
    body {
        font-size: 0.9rem;
    }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.3rem; }
    h4 { font-size: 1.15rem; }
    h5 { font-size: 1.0rem; }
    
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .card-body {
        padding: 1rem !important;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .btn-mobile-block {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .table-responsive-mobile {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}