@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ============================================
   AKRAB Design System — SMAN 3 Padang
   Modern, Clean, Health-focused
   ============================================ */

:root {
    /* Primary — Emerald Green (Health & Wellness) */
    --primary-color: #10b981;
    --primary-light: #34d399;
    --primary-dark: #059669;
    --primary-gradient: linear-gradient(135deg, #34d399, #10b981);
    --primary-gradient-vivid: linear-gradient(135deg, #6ee7b7, #10b981, #059669);

    /* Secondary — Blue */
    --secondary-color: #3b82f6;
    --secondary-gradient: linear-gradient(135deg, #60a5fa, #3b82f6);

    /* Semantic */
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #10b981;

    /* Surfaces */
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --surface: #ffffff;
    --surface-muted: #f1f5f9;
    --surface-elevated: #ffffff;
    --border-color: #e2e8f0;
    --input-bg: #ffffff;
    --input-border: #e2e8f0;

    /* Navbar */
    --navbar-bg: rgba(255, 255, 255, 0.88);
    --navbar-scrolled-bg: rgba(255, 255, 255, 0.96);
    --navbar-border: rgba(16, 185, 129, 0.15);

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.04);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.06), 0 1px 2px -1px rgb(0 0 0 / 0.06);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.04);
    --shadow-primary: 0 4px 14px 0 rgba(16, 185, 129, 0.25);
    --shadow-primary-lg: 0 8px 24px 0 rgba(16, 185, 129, 0.3);

    /* Radii */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

/* ============================================
   Base & Typography
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--surface-muted);
    color: var(--text-main);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.25;
}

/* ============================================
   Navbar
   ============================================ */

.navbar {
    background: var(--navbar-bg) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--navbar-border);
    box-shadow: var(--shadow-xs) !important;
    transition: all 0.3s ease;
    padding: 0.75rem 0 !important;
    z-index: 1030;
}

.navbar.is-scrolled {
    background: var(--navbar-scrolled-bg) !important;
    box-shadow: var(--shadow-md) !important;
}

.navbar-brand {
    font-weight: 900 !important;
    background: var(--primary-gradient) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    font-size: 1.5rem !important;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand i, .navbar-brand svg {
    -webkit-text-fill-color: var(--primary-color);
    color: var(--primary-color);
}

.nav-link {
    font-weight: 600 !important;
    font-size: 0.925rem;
    color: var(--text-main) !important;
    transition: all 0.2s ease !important;
    padding: 0.5rem 0.85rem !important;
    margin: 0 0.05rem;
    border-radius: var(--radius-md);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color) !important;
    background-color: rgba(16, 185, 129, 0.07);
}

.navbar-toggler {
    border: none !important;
    background: rgba(16, 185, 129, 0.08) !important;
    padding: 0.45rem 0.75rem;
    border-radius: var(--radius-sm);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2) !important;
}

.navbar-toggler-icon {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(130deg) brightness(101%) contrast(100%);
}

.theme-toggle {
    color: var(--text-main);
    background: var(--surface-muted);
    border: 1px solid var(--border-color);
    min-height: 40px;
    font-size: 0.875rem;
}

.theme-toggle:hover {
    color: var(--primary-dark);
    background: color-mix(in srgb, var(--primary-color) 8%, var(--surface));
    border-color: var(--primary-color);
}

/* ============================================
   Dark Mode
   ============================================ */

[data-bs-theme="dark"] {
    --bg-light: #0f172a;
    --bg-white: #172033;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --surface: #1e293b;
    --surface-muted: #0f172a;
    --surface-elevated: #1e293b;
    --border-color: #334155;
    --input-bg: #0f172a;
    --input-border: #334155;
    --navbar-bg: rgba(15, 23, 42, 0.88);
    --navbar-scrolled-bg: rgba(15, 23, 42, 0.96);
    --navbar-border: rgba(52, 211, 153, 0.2);
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.35);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.6);
    --shadow-primary: 0 4px 14px 0 rgba(16, 185, 129, 0.2);
    --bs-body-bg: var(--surface-muted);
    --bs-body-color: var(--text-main);
    --bs-border-color: var(--border-color);
}

[data-bs-theme="dark"] .alert-info { color: #c7e9ff; background-color: #12324a; }
[data-bs-theme="dark"] .alert-warning { color: #fde7a6; background-color: #422f0e; }
[data-bs-theme="dark"] .alert-danger { color: #fecaca; background-color: #481b22; }
[data-bs-theme="dark"] .alert-success { color: #bbf7d0; background-color: #123825; }

[data-bs-theme="dark"] .risk-low { background-color: #052e16; color: #86efac; border-color: #166534; }
[data-bs-theme="dark"] .risk-medium { background-color: #422006; color: #fcd34d; border-color: #92400e; }
[data-bs-theme="dark"] .risk-high { background-color: #450a0a; color: #fca5a5; border-color: #991b1b; }

/* ============================================
   Cards
   ============================================ */

.card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    background-color: var(--surface);
    color: var(--text-main);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    overflow: hidden;
}

.card-hover:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.card-header,
.card-footer,
.modal-header,
.modal-footer {
    color: var(--text-main);
    background-color: var(--surface) !important;
    border-color: var(--border-color);
}

.bg-light, .bg-white, .list-group-item {
    color: var(--text-main);
    background-color: var(--surface-elevated) !important;
    border-color: var(--border-color);
}

.text-dark { color: var(--text-main) !important; }
.text-muted, .form-text { color: var(--text-muted) !important; }
.border, .border-top, .border-end, .border-bottom, .border-start {
    border-color: var(--border-color) !important;
}

/* ============================================
   Forms
   ============================================ */

.form-control, .form-select, .input-group-text {
    color: var(--text-main);
    background-color: var(--input-bg);
    border-color: var(--input-border);
    border-radius: var(--radius-md);
}

.form-control::placeholder { color: var(--text-muted); opacity: 0.7; }

.form-control:focus, .form-select:focus {
    color: var(--text-main);
    background-color: var(--input-bg);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-control:disabled, .form-select:disabled {
    color: var(--text-muted);
    background-color: var(--surface-muted);
    opacity: 0.75;
}

/* ============================================
   Tables
   ============================================ */

.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-main);
    --bs-table-border-color: var(--border-color);
    --bs-table-striped-bg: color-mix(in srgb, var(--surface-muted) 60%, transparent);
    --bs-table-striped-color: var(--text-main);
    --bs-table-hover-bg: color-mix(in srgb, var(--primary-color) 8%, transparent);
    --bs-table-hover-color: var(--text-main);
}

/* ============================================
   Modals & Dropdowns
   ============================================ */

.modal-content, .dropdown-menu {
    color: var(--text-main);
    background-color: var(--surface);
    border-color: var(--border-color);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
}

.dropdown-item { color: var(--text-main); }
.dropdown-item:hover, .dropdown-item:focus {
    color: var(--text-main);
    background-color: color-mix(in srgb, var(--primary-color) 10%, var(--surface));
}

/* ============================================
   Alerts
   ============================================ */

.alert {
    color: var(--text-main);
    border-color: var(--border-color);
    border-radius: var(--radius-lg);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.925rem;
    padding: 0.6rem 1.25rem;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--primary-gradient);
    border: none;
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #10b981, #059669);
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary-lg);
    color: white;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    border-width: 2px;
}

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

.btn-warning { background-color: var(--warning-color); border: none; color: white; }
.btn-danger { background-color: var(--danger-color); border: none; }
.rounded-pill { border-radius: var(--radius-full) !important; }

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

/* ============================================
   Dashboard Specific
   ============================================ */

.stat-card {
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    color: white;
    border: none;
}

.stat-card.bg-good { background: var(--primary-gradient); }
.stat-card.bg-warning { background: linear-gradient(135deg, #fcd34d, #f59e0b); }
.stat-card.bg-danger { background: linear-gradient(135deg, #fca5a5, #ef4444); }

.risk-badge {
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    display: inline-block;
    font-size: 0.95rem;
}

.risk-low { background-color: #ecfdf5; color: #059669; border: 1px solid #a7f3d0; }
.risk-medium { background-color: #fffbeb; color: #d97706; border: 1px solid #fde68a; }
.risk-high { background-color: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }

.ttd-action-btn { border-radius: var(--radius-full); padding: 12px 24px; font-weight: bold; }

/* ============================================
   Login / Register Pages
   ============================================ */

.login-bg {
    background: linear-gradient(135deg, #ecfdf5 0%, #dbeafe 50%, #ede9fe 100%);
    min-height: 100vh;
}

.login-card {
    background: var(--bg-white);
    border-radius: var(--radius-2xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px);
    overflow: hidden;
}

.login-card .card-accent {
    background: var(--primary-gradient-vivid);
    height: 4px;
    width: 100%;
}

[data-bs-theme="dark"] .login-bg {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
}

[data-bs-theme="dark"] .login-card {
    background: var(--surface);
    border-color: var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* ============================================
   Landing Page — Hero
   ============================================ */

.hero-section {
    background: linear-gradient(160deg, #059669 0%, #10b981 40%, #3b82f6 100%);
    color: white;
    padding: 100px 0 120px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-section .container { position: relative; z-index: 1; }

.hero-section h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.15;
    text-shadow: 0 2px 12px rgba(0,0,0,0.1);
}

.hero-section .lead {
    font-size: 1.15rem;
    opacity: 0.92;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* ============================================
   Landing Page — Stats Bar
   ============================================ */

.stats-bar {
    background: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-top: -40px;
    position: relative;
    z-index: 2;
    border: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
    padding: 1.75rem 1rem;
}

.stat-item .stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-item .stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 0.35rem;
}

/* ============================================
   Landing Page — Features
   ============================================ */

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon-wrap {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon-wrap {
    background: var(--primary-gradient);
    color: white;
    transform: scale(1.08);
}

/* ============================================
   Landing Page — How It Works
   ============================================ */

.step-number {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    color: white;
    font-weight: 800;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-primary);
}

/* ============================================
   Landing Page — CTA
   ============================================ */

.cta-section {
    background: linear-gradient(160deg, #059669, #10b981);
    color: white;
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

/* ============================================
   Landing Page — Footer
   ============================================ */

.site-footer {
    background: var(--text-main);
    color: rgba(255, 255, 255, 0.7);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer a { color: rgba(255, 255, 255, 0.8); text-decoration: none; }
.site-footer a:hover { color: var(--primary-light); }

[data-bs-theme="dark"] .site-footer {
    background: #020617;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in-up {
    animation: fadeInUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    opacity: 0;
}

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }

@keyframes pulse-soft {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
    70% { transform: scale(1.03); box-shadow: 0 0 0 12px rgba(16, 185, 129, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.animate-pulse-soft { animation: pulse-soft 2s infinite; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.animate-float { animation: float 3s ease-in-out infinite; }

/* ============================================
   Badge Enhancements
   ============================================ */

.badge { font-weight: 600; padding: 0.45em 0.75em; }

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

@media (max-width: 768px) {
    .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        background: var(--surface);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-lg);
    }
    .navbar .nav-link { margin: 0.1rem 0; }
    .navbar .theme-toggle { width: 100%; margin-top: 0.25rem; }
    .card { margin-bottom: 0.75rem; }
    .hero-section { padding: 60px 0 80px; }
    .hero-section h1 { font-size: 1.75rem; }
    .stat-item .stat-number { font-size: 1.5rem; }
    .feature-card { padding: 1.5rem; }
}

/* ============================================
   Accessibility
   ============================================ */

.skip-link {
    position: fixed;
    left: 1rem;
    top: -5rem;
    z-index: 2000;
    padding: 0.75rem 1rem;
    background: var(--surface);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus { top: 1rem; }

:focus-visible {
    outline: 3px solid #f59e0b;
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}