/* 815K Landing Page Styles */

:root {
    --primary-color: #58a6ff;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-color: #667eea;
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-card: #ffffff;
    --text-primary: #1f2328;
    --text-secondary: #636c76;
    --text-tertiary: #8b949e;
    --border-color: #d0d7de;
    --shadow: 0 1px 3px rgba(27, 31, 36, 0.12), 0 8px 24px rgba(66, 74, 83, 0.12);
    --nav-bg: rgba(255, 255, 255, 0.95);
}

body.dark-mode {
    --primary-color: #58a6ff;
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #161b22;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    --border-color: #30363d;
    --shadow: 0 0 0 1px #30363d, 0 16px 32px rgba(1, 4, 9, 0.85);
    --nav-bg: rgba(13, 17, 23, 0.95);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Navigation */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--primary-color);
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
}

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

.nav-dark-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-dark-toggle:hover {
    background: var(--bg-card);
    transform: scale(1.05);
}

.nav-admin {
    background: var(--primary-color);
    color: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s;
}

.nav-admin:hover {
    background: #1f6feb;
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 2rem;
    color: white;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: white;
    color: #667eea;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Sections */
.features,
.featured-media,
.story-drink {
    padding: 6rem 1.5rem;
}

.features-container,
.featured-container,
.story-drink-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Feature Cards */
.features-grid,
.featured-grid,
.story-drink-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--primary-gradient);
    color: white;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.feature-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Drink Cards (Storytellers) */
.drink-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
}

.drink-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.drink-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
}

.drink-content {
    padding: 1.5rem;
}

.drink-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.drink-subtitle {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.drink-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

    .nav-link {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features,
    .featured-media,
    .story-drink {
        padding: 4rem 1rem;
    }

    .features-grid,
    .featured-grid,
    .story-drink-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* Statistics Section */
.stats-section {
    padding: 6rem 1.5rem;
    background: var(--primary-gradient);
}

.stats-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* Timeline Section */
.timeline-section {
    padding: 6rem 1.5rem;
    background: var(--bg-secondary);
}

.timeline-container {
    max-width: 1000px;
    margin: 0 auto;
}

.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.timeline-item:nth-child(odd) .timeline-marker {
    order: 2;
}

.timeline-item:nth-child(odd) .timeline-content {
    order: 1;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-marker {
    order: 1;
}

.timeline-item:nth-child(even) .timeline-content {
    order: 2;
    text-align: left;
}

.timeline-marker {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    background: var(--primary-gradient);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    z-index: 1;
}

.timeline-content {
    padding: 1.5rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.timeline-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding-left: 80px;
    }

    .timeline-marker {
        position: absolute;
        left: -50px;
        width: 80px;
        height: 80px;
        font-size: 1.25rem;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        order: 1;
        text-align: left;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* About Section */
.about-section {
    padding: 6rem 1.5rem;
    background: var(--bg-primary);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content {
    max-width: 600px;
}

.about-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-features {
    display: grid;
    gap: 1rem;
    margin-top: 2rem;
}

.about-feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    color: var(--text-primary);
}

.about-feature-item i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.about-image {
    border-radius: 16px;
    overflow: hidden;
}

@media (max-width: 768px) {
    .about-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* CTA Section */
.cta-section {
    padding: 6rem 1.5rem;
    background: var(--primary-gradient);
    text-align: center;
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.landing-footer {
    background: var(--bg-secondary);
    padding: 4rem 1.5rem 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-links a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-contact p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* AI Recommendation Section */
.ai-recommendation {
    padding: 4rem 1rem;
    background: var(--bg-secondary);
}

.recommend-container {
    max-width: 900px;
    margin: 0 auto;
}

.ai-section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.ai-section-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.ai-section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ai-section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* AI Search Box */
.ai-search-box {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.ai-search-input-wrapper {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.ai-search-input-wrapper > i {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.ai-search-input-wrapper input {
    flex: 1;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.ai-search-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.ai-search-btn {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.ai-search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

/* Preset Keywords */
.preset-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    justify-content: center;
    padding: 0.5rem 0;
}

.keyword-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.keyword-btn:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

/* Advanced Filters */
.advanced-filters {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    margin-bottom: 2rem;
    overflow: hidden;
}

.filter-toggle {
    width: 100%;
    padding: 1rem 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.filter-toggle:hover {
    background: var(--bg-secondary);
}

.filter-toggle span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-content {
    display: none;
    padding: 0 1.5rem 1.5rem;
    gap: 1rem;
}

.filter-card {
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.filter-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.filter-header i {
    font-size: 1.25rem;
    color: var(--accent-color);
}

/* People Selector */
.people-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

.counter-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 2px solid var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.counter-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.1);
}

.counter-btn:active {
    transform: scale(0.95);
}

.people-display {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    min-width: 4rem;
    text-align: center;
}

/* Duration Slider */
.duration-slider {
    padding: 0 0.5rem;
}

.duration-slider input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.duration-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.duration-slider input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.duration-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.current-duration {
    font-weight: 700;
    color: var(--accent-color);
    font-size: 0.9rem;
}

/* Toggle Switch */
.toggle-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toggle-switch {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    padding: 0.75rem;
    background: var(--bg-card);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.toggle-switch:hover {
    background: var(--bg-primary);
}

.toggle-switch input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    width: 48px;
    height: 26px;
    background: var(--border-color);
    border-radius: 13px;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    top: 3px;
    left: 3px;
    transition: all 0.3s ease;
}

.toggle-switch input[type="checkbox"]:checked + .toggle-slider {
    background: var(--accent-color);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-slider::before {
    transform: translateX(22px);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    flex: 1;
}

.toggle-label i {
    font-size: 1.1rem;
}

/* Budget Selector */
.budget-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.budget-chip {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.budget-chip:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.budget-chip.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

/* AI Results */
.ai-results {
    display: none;
    margin-top: 2rem;
}

.ai-response-box {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border: 2px solid var(--accent-color);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-avatar {
    font-size: 2.5rem;
    line-height: 1;
}

.ai-message {
    flex: 1;
}

.ai-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.ai-message p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.query-understanding {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

/* Recommended Courses */
.recommended-courses {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-recommendation-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.course-recommendation-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.course-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.375rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.course-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.course-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.course-details {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.course-details span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.course-details i {
    color: var(--accent-color);
}

.course-reason {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.view-course-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.view-course-btn:hover {
    background: #764ba2;
    transform: translateX(4px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .ai-section-title {
        font-size: 2rem;
    }

    .ai-search-input-wrapper {
        flex-direction: column;
    }

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

    .preset-keywords {
        justify-content: center;
    }

    .filter-content {
        padding: 0 1rem 1rem;
    }

    .filter-card {
        padding: 0.875rem;
    }

    .people-selector {
        gap: 1rem;
    }

    .counter-btn {
        width: 2.25rem;
        height: 2.25rem;
    }

    .people-display {
        font-size: 1.25rem;
        min-width: 3rem;
    }

    .budget-selector {
        grid-template-columns: repeat(2, 1fr);
    }

    .recommended-courses {
        grid-template-columns: 1fr;
    }

    .ai-response-box {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .filter-toggle {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
    }

    .budget-chip {
        font-size: 0.8rem;
        padding: 0.625rem;
    }
}

.hq-fab:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.6);
}

.hq-fab i {
    font-size: 28px;
    animation: pulse 2s ease-in-out infinite;
}


.hq-fab::before {
    content: 'HQ';
    position: absolute;
    top: -30px;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.hq-fab:hover::before {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .hq-fab {
        width: 56px;
        height: 56px;
        bottom: 1.5rem;
        right: 1.5rem;
    }

    .hq-fab i {
        font-size: 24px;
    }
}

/* HQ Navigation Button - Top Right */
.nav-hq {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.nav-hq:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
}

.nav-hq i {
    font-size: 1.2rem;
    animation: rotate-grid 3s ease-in-out infinite;
}

@keyframes rotate-grid {
    0%, 100% {
        transform: rotate(0deg);
    }
    50% {
        transform: rotate(180deg);
    }
}

@media (max-width: 768px) {
    .nav-hq {
        padding: 0.625rem 1.25rem;
        font-size: 0.85rem;
    }
    
    .nav-hq i {
        font-size: 1rem;
    }
}