* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #16161f;
    --border: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(200, 140, 220, 0.25);
    --text-primary: #e8e8f0;
    --text-secondary: #9898a8;
    --text-muted: #606070;
    --accent: #c882e0;
    --accent-soft: rgba(200, 130, 224, 0.12);
    --accent-pink: #e87aaf;
    --accent-blue: #6aace8;
    --accent-green: #5cd8a0;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(200, 130, 224, 0.08);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 50px 24px 80px;
    line-height: 1.6;
}

/* Visitor Badge */
.visitor-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    width: fit-content;
    margin: 0 auto 30px;
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
}

.visitor-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 6px var(--accent-green);
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 60px;
}

.header h1 {
    color: var(--text-primary);
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #e87aaf, #c882e0, #6aace8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 400;
}

/* Themenauswahl */
.theme-selection {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    max-width: 720px;
    margin: 0 auto;
}

.theme-btn {
    flex: 1;
    min-width: 280px;
    max-width: 340px;
    padding: 32px 28px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    font-family: inherit;
    line-height: 1.6;
}

.theme-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow), var(--shadow-glow);
}

.theme-btn span {
    display: block;
    font-size: 2rem;
    margin-bottom: 14px;
}

.theme-btn strong {
    display: block;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 4px;
}

/* Content */
.content-area {
    max-width: 760px;
    margin: 0 auto;
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 20px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.25s ease;
    margin-bottom: 32px;
}

.back-btn:hover {
    border-color: var(--border-hover);
    color: var(--accent);
    background: var(--bg-card-hover);
}

/* Karten */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px 32px;
    margin-bottom: 18px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(200, 130, 224, 0.15), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow);
}

.card:hover::before {
    opacity: 1;
}

.card h2 {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}

.card h3 {
    color: var(--accent);
    font-size: 1.08rem;
    font-weight: 600;
    margin-top: 20px;
    margin-bottom: 12px;
}

.card h4 {
    color: var(--accent-blue);
    font-size: 0.92rem;
    font-weight: 600;
    margin-top: 16px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.8rem;
}

.card p {
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.card ul {
    list-style: none;
    padding-left: 0;
    margin: 10px 0;
}

.card ul li {
    padding: 7px 0 7px 24px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.93rem;
}

.card ul li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 15px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.5;
}

.card strong {
    color: var(--text-primary);
    font-weight: 600;
}

.merksatz {
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    padding: 14px 18px;
    margin-top: 18px;
    border-radius: 0 12px 12px 0;
    color: #d4b0e8;
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.6;
}

.highlight-box {
    background: rgba(106, 172, 232, 0.08);
    border: 1px solid rgba(106, 172, 232, 0.2);
    border-radius: 12px;
    padding: 18px 22px;
    margin-top: 18px;
    color: var(--accent-blue);
    font-weight: 600;
    font-size: 0.93rem;
    line-height: 1.6;
}

/* Teste dein Wissen Button */
.quiz-trigger {
    display: block;
    width: 100%;
    max-width: 420px;
    margin: 50px auto;
    padding: 20px 36px;
    background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
    border: 1px solid var(--border-hover);
    border-radius: 16px;
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.quiz-trigger::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(200, 130, 224, 0.05), rgba(106, 172, 232, 0.05));
    opacity: 0;
    transition: opacity 0.3s;
}

.quiz-trigger:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(200, 130, 224, 0.15);
    border-color: var(--accent);
}

.quiz-trigger:hover::before {
    opacity: 1;
}

/* Quiz */
.quiz-area {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 30px;
}

.quiz-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px 28px;
    margin-bottom: 18px;
    transition: border-color 0.3s ease;
}

.quiz-card:hover {
    border-color: var(--border-hover);
}

.quiz-card p {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 1rem;
    line-height: 1.5;
}

.quiz-card label {
    display: block;
    padding: 12px 16px;
    margin: 6px 0;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.92rem;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.quiz-card label:hover {
    background: var(--accent-soft);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.quiz-card input[type="radio"] {
    margin-right: 12px;
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

.check-btn {
    display: block;
    margin: 30px auto 0;
    padding: 16px 44px;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent));
    border: none;
    border-radius: 12px;
    color: #0a0a0f;
    font-size: 1rem;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: -0.2px;
}

.check-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(200, 130, 224, 0.3);
}

.result {
    margin-top: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.88rem;
    display: none;
    border: 1px solid transparent;
}

.result.correct {
    background: rgba(92, 216, 160, 0.08);
    border-color: rgba(92, 216, 160, 0.2);
    color: var(--accent-green);
    display: block;
}

.result.wrong {
    background: rgba(232, 80, 80, 0.08);
    border-color: rgba(232, 80, 80, 0.2);
    color: #e86060;
    display: block;
}

/* Vorlesen Button */
.read-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid rgba(106, 172, 232, 0.2);
    background: rgba(106, 172, 232, 0.06);
    color: var(--accent-blue);
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.8rem;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.25s ease;
    margin-top: 18px;
    float: right;
}

.read-btn:hover {
    background: rgba(106, 172, 232, 0.12);
    border-color: rgba(106, 172, 232, 0.4);
    transform: translateY(-1px);
}

.read-btn.reading {
    background: rgba(232, 80, 80, 0.08);
    border-color: rgba(232, 80, 80, 0.25);
    color: #e86060;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 80px;
    padding: 30px 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.footer span {
    color: var(--accent-pink);
    font-size: 0.75rem;
    opacity: 0.7;
}

.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 640px) {
    body { padding: 30px 16px 60px; }
    .header h1 { font-size: 1.6rem; }
    .theme-selection { gap: 14px; }
    .theme-btn { min-width: 100%; padding: 24px 20px; }
    .card { padding: 22px 20px; border-radius: 14px; }
    .quiz-card { padding: 20px; }
    .quiz-trigger { max-width: 100%; }
}