/* ==============================================================================
   Hohfeld Web Hub – Design System & A11y First Styles
   WCAG 2.2 AA / AAA konforme Farbpalette, Fokus-Zustände und Typografie
   ============================================================================== */

/* --- CSS Tokens (Dark Theme Default) --- */
:root {
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Theme Colors (Dark Mode) */
    --bg-canvas: #090d16;
    --bg-surface: #101726;
    --bg-card: #151e32;
    --bg-card-hover: #1c2742;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
    --border-accent: rgba(56, 189, 248, 0.4);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-inverse: #090d16;

    --accent: #38bdf8;
    --accent-hover: #7dd3fc;
    --accent-glow: rgba(56, 189, 248, 0.15);
    --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);

    --starwars-accent: #fbbf24;
    --kicker-accent: #22c55e;
    --hotels-accent: #38bdf8;
    --lernen-accent: #a855f7;

    --status-live-bg: rgba(34, 197, 94, 0.12);
    --status-live-text: #4ade80;
    --status-live-border: rgba(34, 197, 94, 0.3);

    --status-dev-bg: rgba(234, 179, 8, 0.12);
    --status-dev-text: #facc15;
    --status-dev-border: rgba(234, 179, 8, 0.3);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.45);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Light Theme Tokens --- */
[data-theme="light"] {
    --bg-canvas: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;

    --border-subtle: rgba(15, 23, 42, 0.08);
    --border-strong: rgba(15, 23, 42, 0.16);
    --border-accent: rgba(2, 132, 199, 0.4);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;

    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-glow: rgba(2, 132, 199, 0.12);
    --accent-gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);

    --starwars-accent: #d97706;
    --kicker-accent: #16a34a;
    --hotels-accent: #0284c7;
    --lernen-accent: #9333ea;

    --status-live-bg: rgba(22, 163, 74, 0.1);
    --status-live-text: #15803d;
    --status-live-border: rgba(22, 163, 74, 0.25);

    --status-dev-bg: rgba(202, 138, 4, 0.1);
    --status-dev-text: #a16207;
    --status-dev-border: rgba(202, 138, 4, 0.25);

    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.08);
}

/* --- Reset & Global Defaults --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-canvas);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    -webkit-font-smoothing: antialiased;
}

/* --- Barrierefreier Sprunglink (WCAG 2.4.1) --- */
.skip-link {
    position: absolute;
    top: -100px;
    left: 20px;
    background: var(--accent);
    color: var(--text-inverse);
    padding: 12px 20px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    z-index: 9999;
    text-decoration: none;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 20px;
}

/* --- Barrierefreie Fokus-Indikatoren (WCAG 2.4.7) --- */
:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* --- Layout Container --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Header & Navigation --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(9, 13, 22, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="light"] .site-header {
    background: rgba(255, 255, 255, 0.88);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.brand-subtitle {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--border-subtle);
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-strong);
    transform: scale(1.05);
}

.moon-icon {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

/* --- Hero Sektion --- */
.hero-section {
    padding: 80px 0 50px 0;
    text-align: center;
}

.hero-container {
    max-width: 840px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--accent-glow);
    border: 1px solid var(--border-accent);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 20px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 36px;
}

.hero-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.hero-feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* --- Themen Bereich & Grid --- */
.topics-container {
    padding-bottom: 80px;
    flex: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

/* --- Topic Card Styling --- */
.topic-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
    position: relative;
}

.topic-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    background: var(--bg-card-hover);
}

.card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 24px;
}

.topic-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.starwars-icon {
    color: var(--starwars-accent);
    background: rgba(251, 191, 36, 0.1);
}

.kicker-icon {
    color: var(--kicker-accent);
    background: rgba(34, 197, 94, 0.1);
}

.hotels-icon {
    color: var(--hotels-accent);
    background: rgba(56, 189, 248, 0.1);
}

.lernen-icon {
    color: var(--lernen-accent);
    background: rgba(168, 85, 247, 0.1);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.status-live {
    background: var(--status-live-bg);
    color: var(--status-live-text);
    border: 1px solid var(--status-live-border);
}

.status-dev {
    background: var(--status-dev-bg);
    color: var(--status-dev-text);
    border: 1px solid var(--status-dev-border);
}

.status-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.status-live .status-indicator {
    box-shadow: 0 0 6px currentColor;
}

.topic-title {
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
}

.topic-description {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.6;
    margin-bottom: 24px;
    flex: 1;
}

.topic-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.highlight-tag {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-surface);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

/* --- Card Action & Buttons --- */
.card-footer {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 20px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    min-height: 46px; /* A11y Touch Target */
    transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
    background: var(--accent);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-disabled {
    background: var(--bg-surface);
    color: var(--text-tertiary);
    border-color: var(--border-subtle);
    cursor: not-allowed;
    opacity: 0.8;
}

.auth-hint {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    text-align: center;
}

/* --- Footer --- */
.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    padding: 32px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: auto;
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-copy {
    font-weight: 600;
    color: var(--text-primary);
}

.footer-divider {
    color: var(--text-tertiary);
}

.footer-note {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.back-to-top {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.back-to-top:hover {
    color: var(--accent);
    background: var(--border-subtle);
}

/* --- Hilfsklassen --- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Responsive Media Queries --- */
@media (max-width: 820px) {
    .header-container {
        height: auto;
        padding: 16px 24px;
        flex-wrap: wrap;
        gap: 12px;
    }

    .main-nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .nav-list {
        gap: 4px;
    }

    .nav-link {
        padding: 6px 10px;
        font-size: 0.88rem;
        white-space: nowrap;
    }

    .hero-section {
        padding: 48px 0 32px 0;
    }

    .footer-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

/* --- Respektierung von Prefers-Reduced-Motion (WCAG 2.3.3) --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}