/**
 * =============================================================================
 * ONLINE DICTIONARY - Custom Styles (W3Schools Theme)
 * =============================================================================
 * Main stylesheet for the Online Dictionary application.
 * Built on top of Bootstrap 5 with W3Schools-inspired green and white theme.
 * =============================================================================
 */

/* =============================================================================
   CSS Variables / Custom Properties
   ============================================================================= */
:root {
    /* W3Schools Brand Colors */
    --od-primary: #04AA6D;
    --od-primary-dark: #059862;
    --od-primary-light: #D9EEE1;
    --od-secondary: #282A35;
    --od-accent: #FFC0C7;

    /* UI Colors */
    --od-success: #04AA6D;
    --od-warning: #FFF4A3;
    --od-warning-dark: #E7B10A;
    --od-danger: #dc3545;
    --od-info: #04AA6D;

    /* Neutral Colors */
    --od-white: #FFFFFF;
    --od-gray-50: #f8f9fa;
    --od-gray-100: #f1f1f1;
    --od-gray-200: #e7e9eb;
    --od-gray-300: #dee2e6;
    --od-gray-400: #ced4da;
    --od-gray-500: #adb5bd;
    --od-gray-600: #6c757d;
    --od-gray-700: #495057;
    --od-gray-800: #343a40;
    --od-gray-900: #282A35;

    /* Text Colors */
    --od-text-dark: #282A35;
    --od-text-muted: #6c757d;
    --od-text-light: #FFFFFF;

    /* Gradients - Simplified for W3Schools style */
    --od-gradient-primary: linear-gradient(135deg, #04AA6D 0%, #059862 100%);
    --od-gradient-success: linear-gradient(135deg, #04AA6D 0%, #28a745 100%);
    --od-gradient-dark: linear-gradient(135deg, #282A35 0%, #3c3f4a 100%);

    /* Shadows */
    --od-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --od-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --od-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --od-transition: all 0.3s ease;
    --od-transition-fast: all 0.15s ease;
}

/* =============================================================================
   Base Styles
   ============================================================================= */

/* Sticky footer layout - ensures footer stays at bottom on short pages */
html {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--od-text-dark);
    background-color: var(--od-white);
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

/* Main content grows to push footer down */
main {
    flex: 1 0 auto;
}

/* Better focus styles for accessibility */
:focus-visible {
    outline: 3px solid var(--od-primary);
    outline-offset: 2px;
}

/* Links */
a {
    color: var(--od-primary);
    text-decoration: none;
}

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

/* =============================================================================
   Typography
   ============================================================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--od-text-dark);
}

.display-1, .display-2, .display-3, .display-4 {
    font-weight: 700;
}

/* =============================================================================
   Navigation
   ============================================================================= */
.navbar {
    background-color: var(--od-gray-900) !important;
    transition: var(--od-transition);
    padding: 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--od-white) !important;
    padding: 15px 20px;
}

.navbar-brand:hover {
    color: var(--od-primary) !important;
}

.nav-link {
    font-weight: 500;
    color: var(--od-white) !important;
    padding: 15px 20px !important;
    transition: var(--od-transition-fast);
}

.nav-link:hover {
    background-color: var(--od-primary) !important;
    color: var(--od-white) !important;
}

.navbar-nav .nav-link.active {
    background-color: var(--od-primary);
    color: var(--od-white) !important;
}

/* Navbar Sign Up Button */
.navbar .btn-primary {
    padding: 8px 20px;
    transition: var(--od-transition);
}

.navbar .btn-primary:hover {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
    box-shadow: 0 0 10px rgba(4, 170, 109, 0.5);
    transform: translateY(-1px);
}

/* Sidebar Navigation (Account Settings, etc.) */
.card-body .nav.flex-column .nav-link,
.card .nav.flex-column .nav-link,
nav.nav.flex-column .nav-link {
    color: #282A35 !important;
    background-color: transparent !important;
    padding: 10px 15px !important;
    border-radius: 4px;
    margin-bottom: 2px;
}

.card-body .nav.flex-column .nav-link:hover,
.card .nav.flex-column .nav-link:hover,
nav.nav.flex-column .nav-link:hover {
    background-color: #D9EEE1 !important;
    color: #059862 !important;
}

.card-body .nav.flex-column .nav-link.active,
.card .nav.flex-column .nav-link.active,
nav.nav.flex-column .nav-link.active {
    background-color: #04AA6D !important;
    color: #FFFFFF !important;
}

/* Navbar toggler */
.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.5);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* =============================================================================
   Cards
   ============================================================================= */
.card {
    transition: var(--od-transition);
    border: 1px solid var(--od-gray-200);
    border-radius: 0.5rem;
    background-color: var(--od-white);
}

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

.card-header {
    background-color: var(--od-primary);
    color: var(--od-white);
    font-weight: 600;
    border-bottom: none;
}

.card-header.bg-light {
    background-color: var(--od-gray-100) !important;
    color: var(--od-text-dark);
}

/* =============================================================================
   Buttons
   ============================================================================= */
.btn {
    font-weight: 500;
    transition: var(--od-transition);
    border-radius: 4px;
    padding: 10px 20px;
}

.btn-primary {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
    color: var(--od-white);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--od-primary-dark);
    border-color: var(--od-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--od-shadow);
}

.btn-secondary {
    background-color: var(--od-gray-900);
    border-color: var(--od-gray-900);
    color: var(--od-white);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--od-gray-800);
    border-color: var(--od-gray-800);
}

.btn-success {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
}

.btn-success:hover,
.btn-success:focus {
    background-color: var(--od-primary-dark);
    border-color: var(--od-primary-dark);
}

.btn-outline-primary {
    color: var(--od-primary);
    border-color: var(--od-primary);
}

.btn-outline-primary:hover {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
    color: var(--od-white);
}

.btn-outline-success {
    color: var(--od-primary);
    border-color: var(--od-primary);
}

.btn-outline-success:hover {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
    color: var(--od-white);
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1.1rem;
}

.btn-light {
    background-color: var(--od-white);
    border-color: var(--od-gray-300);
    color: var(--od-text-dark);
}

.btn-light:hover {
    background-color: var(--od-gray-100);
}

/* W3Schools-style green button */
.btn-w3 {
    background-color: var(--od-primary);
    border: none;
    color: var(--od-white);
    padding: 12px 28px;
    font-size: 17px;
    border-radius: 4px;
}

.btn-w3:hover {
    background-color: var(--od-primary-dark);
    color: var(--od-white);
}

/* =============================================================================
   Forms
   ============================================================================= */
.form-control,
.form-select {
    border-radius: 4px;
    border-color: var(--od-gray-300);
    transition: var(--od-transition-fast);
    padding: 10px 15px;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--od-primary);
    box-shadow: 0 0 0 0.2rem rgba(4, 170, 109, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--od-text-dark);
}

/* =============================================================================
   Tables
   ============================================================================= */
.table {
    margin-bottom: 0;
}

.table thead th {
    background-color: var(--od-primary);
    color: var(--od-white);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: none;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--od-gray-100);
}

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

/* W3Schools-style table */
.table-w3 {
    border-collapse: collapse;
    width: 100%;
}

.table-w3 th {
    background-color: var(--od-primary);
    color: var(--od-white);
    padding: 12px 15px;
    text-align: left;
}

.table-w3 td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--od-gray-200);
}

.table-w3 tr:nth-child(even) {
    background-color: var(--od-gray-100);
}

.table-w3 tr:hover {
    background-color: var(--od-primary-light);
}

/* =============================================================================
   Progress Bars
   ============================================================================= */
.progress {
    border-radius: 4px;
    background-color: var(--od-gray-200);
    overflow: hidden;
}

.progress-bar {
    background-color: var(--od-primary);
    transition: width 0.6s ease;
}

/* =============================================================================
   Badges
   ============================================================================= */
.badge {
    font-weight: 500;
    padding: 0.4em 0.8em;
    border-radius: 4px;
}

.badge.bg-primary,
.bg-primary {
    background-color: var(--od-primary) !important;
}

.badge.bg-success,
.bg-success {
    background-color: var(--od-primary) !important;
}

.badge.bg-info {
    background-color: var(--od-primary) !important;
}

.badge.bg-secondary {
    background-color: var(--od-gray-900) !important;
}

/* =============================================================================
   Alerts
   ============================================================================= */
.alert {
    border: none;
    border-radius: 4px;
    border-left: 4px solid;
}

.alert-success {
    background-color: var(--od-primary-light);
    color: var(--od-primary-dark);
    border-left-color: var(--od-primary);
}

.alert-info {
    background-color: var(--od-primary-light);
    color: var(--od-primary-dark);
    border-left-color: var(--od-primary);
}

.alert-warning {
    background-color: var(--od-warning);
    color: var(--od-text-dark);
    border-left-color: var(--od-warning-dark);
}

.alert-danger {
    background-color: #f8d7da;
    color: #842029;
    border-left-color: var(--od-danger);
}

/* =============================================================================
   Modals
   ============================================================================= */
.modal-content {
    border: none;
    border-radius: 8px;
    box-shadow: var(--od-shadow-lg);
}

.modal-header {
    background-color: var(--od-primary);
    color: var(--od-white);
    border-bottom: none;
    border-radius: 8px 8px 0 0;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-footer {
    border-top-color: var(--od-gray-200);
}

/* =============================================================================
   Dropdowns
   ============================================================================= */
.dropdown-menu {
    border: 1px solid var(--od-gray-200);
    border-radius: 4px;
    box-shadow: var(--od-shadow);
}

.dropdown-item {
    transition: var(--od-transition-fast);
    padding: 10px 20px;
}

.dropdown-item:hover {
    background-color: var(--od-primary);
    color: var(--od-white);
}

.dropdown-item.active,
.dropdown-item:active {
    background-color: var(--od-primary);
}

/* =============================================================================
   Accordion
   ============================================================================= */
.accordion-button:not(.collapsed) {
    background-color: var(--od-primary-light);
    color: var(--od-primary-dark);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(4, 170, 109, 0.25);
    border-color: var(--od-primary);
}

/* =============================================================================
   Pagination
   ============================================================================= */
.page-link {
    color: var(--od-text-dark);
    border-color: var(--od-gray-300);
}

.page-link:hover {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
    color: var(--od-white);
}

.page-item.active .page-link {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
}

/* =============================================================================
   Custom Components
   ============================================================================= */

/* Stat Cards */
.stat-card {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--od-white);
    border: 1px solid var(--od-gray-200);
    border-radius: 8px;
}

.stat-card .stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--od-primary);
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.25rem;
    color: var(--od-text-dark);
}

.stat-card .stat-label {
    font-size: 0.875rem;
    color: var(--od-text-muted);
}

/* Feature Cards */
.feature-card {
    padding: 2rem;
    text-align: center;
    transition: var(--od-transition);
    background-color: var(--od-white);
    border: 1px solid var(--od-gray-200);
    border-radius: 8px;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--od-shadow-lg);
    border-color: var(--od-primary);
}

.feature-card .feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--od-primary);
}

/* Loading Spinner */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner-border {
    color: var(--od-primary);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
}

.empty-state .empty-icon {
    font-size: 4rem;
    color: var(--od-gray-300);
    margin-bottom: 1rem;
}

.empty-state .empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--od-text-dark);
}

.empty-state .empty-description {
    color: var(--od-text-muted);
    margin-bottom: 1.5rem;
}

/* =============================================================================
   Page-Specific Styles
   ============================================================================= */

/* Landing Page Hero */
.hero-section {
    background-color: var(--od-gray-900);
    color: var(--od-white);
    padding: 80px 0;
}

.hero-section h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--od-white);
}

.hero-section p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-section .btn-primary {
    background-color: var(--od-primary);
    border-color: var(--od-primary);
    padding: 15px 30px;
    font-size: 1.1rem;
}

.hero-section .btn-primary:hover {
    background-color: var(--od-primary-dark);
    border-color: var(--od-primary-dark);
}

/* Alternative light hero */
.hero-light {
    background-color: var(--od-primary-light);
    color: var(--od-text-dark);
}

.hero-light h1 {
    color: var(--od-text-dark);
}

/* Section styles */
.section-gray {
    background-color: var(--od-gray-100);
}

.section-dark {
    background-color: var(--od-gray-900);
    color: var(--od-white);
}

.section-green {
    background-color: var(--od-primary);
    color: var(--od-white);
}

/* Dashboard */
.dashboard-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--od-primary);
}

/* Word List */
.word-item {
    transition: var(--od-transition-fast);
    border-left: 3px solid transparent;
}

.word-item:hover {
    background-color: var(--od-primary-light);
    border-left-color: var(--od-primary);
}

/* Pricing Cards */
.pricing-card {
    background-color: var(--od-white);
    border: 1px solid var(--od-gray-200);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    transition: var(--od-transition);
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--od-shadow-lg);
}

.pricing-card.featured {
    border: 2px solid var(--od-primary);
    position: relative;
}

.pricing-card.featured::before {
    content: 'Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--od-primary);
    color: var(--od-white);
    padding: 4px 16px;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-card .price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--od-text-dark);
}

.pricing-card .price span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--od-text-muted);
}

/* =============================================================================
   Utility Classes
   ============================================================================= */

/* Text Colors */
.text-primary {
    color: var(--od-primary) !important;
}

.text-success {
    color: var(--od-primary) !important;
}

.text-dark {
    color: var(--od-text-dark) !important;
}

.text-muted {
    color: var(--od-text-muted) !important;
}

/* Background Colors */
.bg-primary {
    background-color: var(--od-primary) !important;
}

.bg-success {
    background-color: var(--od-primary) !important;
}

.bg-light {
    background-color: var(--od-gray-100) !important;
}

.bg-dark {
    background-color: var(--od-gray-900) !important;
}

.bg-white {
    background-color: var(--od-white) !important;
}

/* W3Schools-style info box */
.note-box {
    background-color: var(--od-warning);
    padding: 20px;
    border-radius: 4px;
    margin: 20px 0;
}

.tip-box {
    background-color: var(--od-primary-light);
    padding: 20px;
    border-radius: 4px;
    margin: 20px 0;
    border-left: 4px solid var(--od-primary);
}

/* Shadows */
.shadow-hover:hover {
    box-shadow: var(--od-shadow-lg) !important;
}

/* Borders */
.border-primary {
    border-color: var(--od-primary) !important;
}

/* =============================================================================
   Animations
   ============================================================================= */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

.animate-slide-up {
    animation: slideUp 0.4s ease;
}

/* =============================================================================
   Footer
   ============================================================================= */
.footer {
    background-color: var(--od-gray-900);
    color: var(--od-white);
    padding: 40px 0;
    flex-shrink: 0; /* Sticky footer - prevents footer from shrinking */
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
}

.footer a:hover {
    color: var(--od-primary);
    text-decoration: none;
}

.footer-brand {
    color: var(--od-white);
    font-weight: 700;
    font-size: 1.25rem;
}

/* =============================================================================
   Responsive Adjustments
   ============================================================================= */

/* Mobile */
@media (max-width: 767.98px) {
    .hero-section {
        padding: 60px 0;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .stat-card .stat-value {
        font-size: 1.5rem;
    }

    .navbar-brand {
        font-size: 1.1rem;
        padding: 10px 15px;
    }

    .nav-link {
        padding: 10px 15px !important;
    }

    .pricing-card .price {
        font-size: 2rem;
    }
}

/* Tablet */
@media (min-width: 768px) and (max-width: 991.98px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
}

/* =============================================================================
   Auth Forms (Login, Signup, Password Reset)
   ============================================================================= */
.auth-card {
    border-radius: 12px;
    overflow: hidden;
}

.auth-card .card-body {
    max-width: 100%;
}

.auth-card h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.auth-card .form-control {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: 8px;
}

.auth-card .btn {
    padding: 12px 20px;
    font-size: 1rem;
    border-radius: 8px;
}

.auth-card .btn-outline-dark {
    border-width: 2px;
    font-weight: 500;
}

.auth-card .btn-outline-dark:hover {
    background-color: var(--od-gray-100);
    color: var(--od-text-dark);
    border-color: var(--od-gray-400);
}

/* Responsive auth form adjustments */
@media (max-width: 575.98px) {
    .auth-card .card-body {
        padding: 1.5rem !important;
    }

    .auth-card h2 {
        font-size: 1.5rem;
    }

    .auth-card .row .col-6 {
        flex: 0 0 100%;
        max-width: 100%;
        margin-bottom: 1rem;
    }

    .auth-card .row .col-6:last-child {
        margin-bottom: 0;
    }
}

@media (min-width: 576px) and (max-width: 767.98px) {
    .auth-card .card-body {
        padding: 2rem !important;
    }
}

/* =============================================================================
   Print Styles
   ============================================================================= */
@media print {
    .navbar,
    .footer,
    .btn,
    .no-print {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

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

    a {
        color: black;
    }
}

/* =============================================================================
   Code Blocks (W3Schools style)
   ============================================================================= */
code {
    background-color: var(--od-gray-100);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: Consolas, "courier new", monospace;
    color: crimson;
}

pre {
    background-color: var(--od-gray-100);
    padding: 15px;
    border-radius: 4px;
    border-left: 4px solid var(--od-primary);
    overflow-x: auto;
}

pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}

/* =============================================================================
   Custom scrollbar (W3Schools style)
   ============================================================================= */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--od-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--od-gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--od-primary);
}