/* Global styles */
:root {
    --primary: #2D3748;
    --secondary: #4A5568;
    --accent: #00C2D1;
    --accent-2: #805AD5;
    --success: #48BB78;
    --warning: #ED8936;
    --danger: #F56565;
    --text: #1A202C;
    --text-light: #718096;
    --bg: #fff;
    --bg-alt: #F7FAFC;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border: #E2E8F0;
    --shadow: 0 4px 6px rgba(0, 0, 0, .07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, .1);
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

html {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-image: url('/assets/images/background.jpg');
    background-attachment: fixed;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100%;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.25);
    pointer-events: none;
    z-index: 1;
}

html,
body {
    height: 100%;
}

/* Ensure all content is above the overlay */
main,
header,
nav,
footer,
.container,
.card,
.modal {
    position: relative;
    z-index: 2;
}

/* Utility classes */
.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.gap-3 {
    gap: 1.5rem;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.p-1 {
    padding: 0.5rem;
}

.p-2 {
    padding: 1rem;
}

.p-3 {
    padding: 1.5rem;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-sm {
    font-size: 0.875rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

.text-2xl {
    font-size: 1.5rem;
}

.font-bold {
    font-weight: 700;
}

.font-semibold {
    font-weight: 600;
}

.text-primary {
    color: var(--primary);
}

.text-secondary {
    color: var(--secondary);
}

.text-light {
    color: var(--text-light);
}

.text-success {
    color: var(--success);
}

.text-warning {
    color: var(--warning);
}

.text-danger {
    color: var(--danger);
}

.bg-primary {
    background: var(--primary);
    color: white;
}

.bg-accent {
    background: var(--accent);
    color: white;
}

/* Header and Navigation */
.header {
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo svg {
    color: var(--accent);
    stroke: currentColor;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a,
.nav-links button {
    color: var(--text-light);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links button:hover {
    color: var(--accent);
}

.nav-links a.active {
    color: var(--accent);
    font-weight: 600;
    border-bottom: 2px solid var(--accent);
}

/* Backdoor indicator */
.backdoor-badge {
    display: none;
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    color: white;
    padding: 0.35rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
    animation: pulse-badge 2s ease-in-out infinite;
}

.backdoor-badge.visible {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

@keyframes pulse-badge {
    0%, 100% {
        box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
    }
    50% {
        box-shadow: 0 2px 12px rgba(245, 158, 11, 0.5);
    }
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-outline:hover {
    background: var(--bg-alt);
}

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: all 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.card p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Grid layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Hero section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 2rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    text-align: center;
}

.hero h1 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.hero p {
    opacity: 0.95;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* Page header */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.page-header p {
    color: var(--text-light);
    font-size: 1.05rem;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(0, 194, 209, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.alert-success {
    background: rgba(72, 187, 120, 0.1);
    border: 1px solid rgba(72, 187, 120, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(245, 101, 101, 0.1);
    border: 1px solid rgba(245, 101, 101, 0.3);
    color: var(--danger);
}

/* Form elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 194, 209, 0.1);
}

/* Responsive breakpoints */

/* Extra small phones (360px - 479px) */
@media (max-width: 480px) {
    :root {
        font-size: 13px;
    }

    .container {
        padding: 0.75rem;
    }

    .header {
        padding: 0.75rem 0.5rem;
    }

    .nav {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .logo {
        font-size: 1rem;
        flex: 1;
        min-width: 150px;
    }

    .logo svg {
        width: 20px;
        height: 20px;
    }

    .nav-links {
        gap: 0.5rem;
        font-size: 0.75rem;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .nav-links a {
        padding: 0.25rem 0.5rem;
        white-space: nowrap;
    }

    /* Hide text for some nav items on very small screens, keep icons */
    .nav-links a[href="/questions/"] {
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
    }

    .btn-group .btn {
        width: 100%;
    }

    .hero {
        padding: 1.5rem 0.75rem;
    }

    .hero h1 {
        font-size: 1.3rem;
        line-height: 1.3;
    }

    .hero p {
        font-size: 0.9rem;
    }

    .card {
        padding: 1rem;
    }

    .card h3 {
        font-size: 1rem;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

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

    .stat-label {
        font-size: 0.75rem;
    }

    /* Question cards on mobile */
    .question-card {
        padding: 1rem;
    }

    /* Modal adjustments */
    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
        max-width: calc(100% - 2rem);
    }

    /* Form inputs */
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px; /* Prevents iOS zoom on focus */
    }
}

/* Small phones and phablets (481px - 640px) */
@media (min-width: 481px) and (max-width: 640px) {
    :root {
        font-size: 14px;
    }

    .container {
        padding: 1rem;
    }

    .nav-links {
        gap: 0.75rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

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

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

/* Tablets and small desktops (641px - 768px) */
@media (min-width: 641px) and (max-width: 768px) {
    .container {
        padding: 1.25rem;
    }

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

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

/* All mobile devices (up to 768px) */
@media (max-width: 768px) {
    .hide-mobile {
        display: none;
    }

    .grid {
        gap: 1rem;
    }

    /* Ensure tables are scrollable */
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    /* Stack buttons vertically on very small screens */
    .modal-footer {
        flex-direction: column;
    }

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

/* Desktop and larger */
@media (min-width: 769px) {
    .show-mobile {
        display: none;
    }
}

/* Large desktops */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }

    .grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}