/* Site-specific styles extracted from llm-course index.html */
/* Adapted for Storytelling with Data (PSYC 81.09) */

/* Navigation - matching demos page style */
        .course-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-md) var(--spacing-xl);
            background: var(--bg-color);
            border-bottom: 1px solid var(--border-color);
            z-index: var(--z-fixed);
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }

        .course-nav.scrolled {
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }

        .course-nav .logo {
            font-size: 1.5rem;
            font-weight: 700;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .course-nav .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .course-nav .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .course-nav .nav-links a:hover,
        .course-nav .nav-links a.active {
            color: var(--primary-color);
        }

        .course-nav .theme-toggle {
            background: var(--surface-color);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-full);
            width: 40px;
            height: 40px;
            font-size: 1.25rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .course-nav .theme-toggle:hover {
            background: var(--surface-hover);
            border-color: var(--primary-color);
            transform: scale(1.05);
        }

        /* Hero Section */
        .hero {
            margin-top: 70px;
            padding: 3rem 2rem 2rem;
            text-align: center;
            background: linear-gradient(180deg, var(--surface-color) 0%, var(--bg-color) 100%);
        }

        .hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            margin-bottom: 1rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: fadeInUp 0.8s ease;
        }

        .hero p {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 1.5rem;
            animation: fadeInUp 0.8s ease 0.2s both;
        }

        .course-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            animation: fadeInUp 0.8s ease 0.3s both;
        }

        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .meta-item .icon {
            font-size: 1.2rem;
        }

        /* Quick Links Bar */
        .quick-links {
            background: var(--surface-color);
            border-bottom: 1px solid var(--border-color);
            padding: 1rem 2rem;
            position: sticky;
            top: 60px;
            z-index: 100;
        }

        .quick-links-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .week-pill {
            background: var(--bg-color);
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            border: 1px solid var(--border-color);
            transition: all var(--transition-base);
            text-decoration: none;
        }

        .week-pill:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }

        .week-pill.active {
            background: var(--gradient-primary);
            color: white;
            border-color: transparent;
        }

        /* Main Content */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }

        /* Loading State */
        .loading {
            text-align: center;
            padding: 4rem 2rem;
            color: var(--text-secondary);
        }

        .loading-spinner {
            width: 40px;
            height: 40px;
            border: 3px solid var(--border-color);
            border-top-color: var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }

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

        /* Week Section */
        .week-section {
            margin-bottom: 2rem;
            scroll-margin-top: 140px;
        }

        .week-header {
            background: var(--surface-color);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.5rem 2rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .week-header:hover {
            border-color: var(--primary-color);
            background: var(--surface-hover);
        }

        .week-header.expanded {
            border-bottom-left-radius: 0;
            border-bottom-right-radius: 0;
            border-bottom-color: transparent;
        }

        .week-header-content {
            flex: 1;
        }

        .week-number {
            display: inline-block;
            background: var(--gradient-1);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .week-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }

        .week-subtitle {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .expand-icon {
            font-size: 1.5rem;
            color: var(--text-secondary);
            transition: transform 0.3s ease;
        }

        .week-header.expanded .expand-icon {
            transform: rotate(180deg);
        }

        .week-content {
            background: var(--surface-color);
            border: 1px solid var(--border-color);
            border-top: none;
            border-bottom-left-radius: var(--radius-lg);
            border-bottom-right-radius: var(--radius-lg);
            padding: 0;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease, padding 0.3s ease;
        }

        .week-content.expanded {
            max-height: 5000px;
            padding: 1.5rem 2rem;
        }

        /* Lecture Card */
        .lecture-card {
            background: var(--bg-color);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
        }

        .lecture-card:last-child {
            margin-bottom: 0;
        }

        .lecture-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .lecture-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 1rem;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .lecture-day {
            background: var(--surface-hover);
            color: var(--primary-color);
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            font-weight: 600;
        }

        .lecture-day.xhour {
            background: rgba(139, 92, 246, 0.2);
            color: #a78bfa;
        }

        .lecture-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .lecture-topics {
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 1rem;
        }

        .lecture-topics ul {
            margin: 0.5rem 0;
            padding-left: 1.5rem;
        }

        .lecture-topics li {
            margin-bottom: 0.25rem;
        }

        /* Resource Links */
        .resource-section {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
        }

        .resource-group {
            margin-bottom: 0.75rem;
        }

        .resource-label {
            font-size: 0.8rem;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }

        .resource-links {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .resource-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.4rem 0.75rem;
            background: var(--surface-color);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            text-decoration: none;
            font-size: 0.85rem;
            transition: all 0.2s ease;
        }

        .resource-link:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        .resource-link.primary {
            background: var(--gradient-primary);
            color: white;
            border-color: transparent;
        }

        .resource-link.primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
            color: white;
        }

        .resource-link .icon {
            font-size: 1rem;
        }

        /* Reading List */
        .readings {
            margin-top: 0.75rem;
        }

        .reading-item {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

        .reading-item .icon {
            color: var(--primary-color);
            flex-shrink: 0;
            margin-top: 0.1rem;
        }

        .reading-item a {
            color: var(--primary-color);
            text-decoration: none;
        }

        .reading-item a:hover {
            text-decoration: underline;
        }

        /* Assignment Badge */
        .assignment-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1rem;
            background: rgba(34, 197, 94, 0.1);
            border: 1px solid rgba(34, 197, 94, 0.3);
            border-radius: var(--radius-md);
            color: #22c55e;
            font-size: 0.9rem;
            margin-top: 0.75rem;
        }

        .assignment-badge.due {
            background: rgba(239, 68, 68, 0.1);
            border-color: rgba(239, 68, 68, 0.3);
            color: #ef4444;
        }

        .assignment-badge a {
            color: inherit;
            text-decoration: underline;
        }

        /* No Class Notice */
        .no-class-notice {
            background: rgba(251, 191, 36, 0.1);
            border: 1px solid rgba(251, 191, 36, 0.3);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: center;
            color: #fbbf24;
            margin-bottom: 1rem;
        }

        .no-class-notice h4 {
            margin-bottom: 0.5rem;
            font-size: 1.1rem;
        }

        .no-class-notice p {
            opacity: 0.8;
            font-size: 0.9rem;
        }

        /* Footer */
        footer {
            background: var(--surface-color);
            border-top: 1px solid var(--border-color);
            padding: 2rem;
            text-align: center;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
        }

        .footer-content p {
            color: var(--text-secondary);
            margin: 0.5rem 0;
        }

        .footer-content a {
            color: var(--primary-color);
            text-decoration: none;
        }

        .footer-content a:hover {
            text-decoration: underline;
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .course-nav .nav-links {
                gap: 1rem;
            }

            .course-meta {
                flex-direction: column;
                gap: 0.75rem;
            }

            .quick-links {
                padding: 0.75rem 1rem;
            }

            .week-pill {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }

            .week-header {
                padding: 1rem 1.5rem;
            }

            .week-title {
                font-size: 1.25rem;
            }

            .lecture-header {
                flex-direction: column;
            }
        }