/* Reset und Basis-Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Farben basierend auf Dashboard-Bild */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #252525;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #b0b0b0;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --border-color: #333333;
    --shadow: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header Styles */
.main-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px var(--shadow);
}

.site-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-align: center;
    letter-spacing: 2px;
}

/* Navigation */
.main-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-link {
    display: block;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
    border: 2px solid transparent;
}

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

.nav-link.active {
    background-color: var(--accent-blue);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 40px 0;
}

/* Breadcrumb */
.breadcrumb {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb span {
    margin: 0 5px;
}

/* Text-to-Speech Controls */
.tts-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding: 15px;
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.tts-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background-color: var(--accent-green);
    color: var(--text-primary);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tts-btn:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

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

.tts-btn-stop {
    background-color: var(--accent-red);
}

.tts-btn-stop:hover {
    background-color: #dc2626;
}

.tts-icon {
    font-size: 1.2rem;
}

.tts-select {
    padding: 10px 15px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    min-width: 200px;
}

.tts-select:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.tts-range {
    width: 150px;
    height: 6px;
    background-color: var(--bg-secondary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.tts-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
}

.tts-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.tts-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

#ttsSpeedValue {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Content Cards */
.content-card {
    background-color: var(--bg-card);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px var(--shadow);
    border: 1px solid var(--border-color);
}

.content-card h2 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 20px;
    font-weight: bold;
}

.content-card h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-top: 25px;
    margin-bottom: 15px;
    font-weight: 600;
}

.content-card h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-top: 20px;
    margin-bottom: 10px;
    font-weight: 600;
}

.content-card p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.content-card ul,
.content-card ol {
    color: var(--text-secondary);
    margin-left: 30px;
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.content-card li {
    margin-bottom: 10px;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 600;
    margin: 5px;
}

.status-badge.green {
    background-color: var(--accent-green);
    color: var(--text-primary);
}

.status-badge.red {
    background-color: var(--accent-red);
    color: var(--text-primary);
}

.status-badge.blue {
    background-color: var(--accent-blue);
    color: var(--text-primary);
}

/* Info Boxes */
.info-box {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--accent-blue);
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.info-box.warning {
    border-left-color: var(--accent-red);
}

.info-box.success {
    border-left-color: var(--accent-green);
}

.info-box h3 {
    margin-top: 0;
    color: var(--text-primary);
}

.info-box a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    margin-top: 10px;
}

.info-box.warning a {
    color: var(--accent-red);
}

.info-box a:hover {
    text-decoration: underline;
}

/* Grid Layout */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

/* Footer */
.main-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    margin-top: 60px;
    text-align: center;
}

.main-footer p {
    color: var(--text-muted);
    margin-bottom: 10px;
    font-size: 0.9rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .site-title {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-secondary);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 10px var(--shadow);
        border-top: 1px solid var(--border-color);
    }

    .nav-list.active {
        display: flex;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 15px;
    }

    .content-card {
        padding: 20px;
    }

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

    .content-card h3 {
        font-size: 1.3rem;
    }

    .content-card h4 {
        font-size: 1.1rem;
    }

    .content-card p,
    .content-card ul,
    .content-card ol {
        font-size: 1rem;
    }

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

    .tts-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .tts-select {
        width: 100%;
        min-width: auto;
    }

    .tts-range {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.5rem;
    }

    .container {
        padding: 0 15px;
    }

    .content-card {
        padding: 15px;
    }

    .tts-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}