:root {
    /* GNOME Libadwaita Light Mode Palette */
    --window-bg: #fafafa;
    --view-bg: #ffffff;
    --card-bg: #ffffff;
    --card-hover: #f5f5f5;
    --card-border: rgba(0, 0, 0, 0.1);
    --text-primary: #1e1e1e;
    --text-secondary: rgba(0, 0, 0, 0.6);
    --accent-color: #0ab3bb;
    --accent-hover: #00cccc;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--window-bg);
    background-image: radial-gradient(var(--card-border) 1.5px, transparent 1.5px);
    background-size: 24px 24px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    font-weight: 800;
    letter-spacing: -1px;
}

/* Navigation */
.navbar {
    padding: 1.5rem 2rem;
    background-color: transparent;
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.brand-name {
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -0.5px;
}

.hero-icon-wrapper {
    perspective: 1000px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

.hero-app-icon {
    width: 180px;
    height: 180px;
    object-fit: contain;
    transition: transform 0.1s ease-out;
    will-change: transform;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

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

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

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--card-hover);
    border-color: var(--text-secondary);
}

.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Centered Hero */
.hero-centered {
    max-width: 1200px;
    margin: 6rem auto 4rem;
    padding: 0 2rem;
    text-align: center;
}

.hero-centered h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #1e1e1e 0%, #666666 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.hero-actions {
    margin-bottom: 4rem;
}

/* Hero Image */
.hero-image-wrapper {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    perspective: 1000px; /* For 3D Parallax Tilt */
}

.hero-image {
    max-width: 100%;
    height: auto;
    display: inline-block;
    transition: transform 0.1s ease-out;
    will-change: transform;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: high-quality;
}

/* Bento Grid */
.bento-section {
    max-width: 1200px;
    margin: 8rem auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: minmax(250px, auto);
    gap: 1.5rem;
}

.bento-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.bento-card:hover {
    transform: translateY(-5px);
    background-color: var(--card-hover);
}

.bento-card.large {
    grid-column: span 2;
    grid-row: span 2;
}

.bento-card.wide {
    grid-column: span 2;
}

.alert-card {
    background: linear-gradient(135deg, rgba(192, 97, 203, 0.1) 0%, rgba(36, 36, 36, 0) 100%);
    border-color: rgba(192, 97, 203, 0.3);
}

.bento-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.bento-card.alert-card h3 {
    color: var(--text-primary);
}

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

/* Footer */
footer {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--card-border);
    margin-top: 6rem;
}

/* Carousel */
.carousel-section {
    max-width: 1000px;
    margin: 6rem auto;
    padding: 0 2rem;
    text-align: center;
}

.carousel-container {
    position: relative;
    height: 600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.carousel-track-container {
    height: 100%;
    position: relative;
    overflow: hidden;
    flex: 1;
}

.carousel-track {
    padding: 0;
    margin: 0;
    list-style: none;
    position: relative;
    height: 100%;
    transition: transform 0.4s ease-in-out;
}

.carousel-slide {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.slide-image {
    max-width: 80%;
    height: auto;
    margin-bottom: 2rem;
}

.slide-placeholder {
    width: 80%;
    height: 350px;
    background-color: var(--card-hover);
    border: 1px dashed var(--text-secondary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.slide-caption {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.slide-desc {
    color: var(--text-secondary);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--view-bg);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    z-index: 10;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    transition: background 0.2s;
}

.carousel-btn:hover {
    background: var(--card-hover);
}

.prev-btn { left: -60px; }
.next-btn { right: -60px; }

.carousel-nav {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
    gap: 1rem;
}

.carousel-indicator {
    border: 0;
    border-radius: 50%;
    width: 10px;
    height: 10px;
    background: var(--card-border);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.carousel-indicator.current-indicator {
    background: var(--text-secondary);
    transform: scale(1.3);
}

/* Theme Slider */
.theme-slider-wrapper {
    position: relative;
    max-width: 80%;
    margin-bottom: 2rem;
    display: inline-block;
}

.slider-img {
    width: 100%;
    height: auto;
    display: block;
}

.slider-img-overlay {
    position: absolute;
    top: 0;
    left: 0;
    clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.slider-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--accent-color);
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 5;
}

.slider-range {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: ew-resize;
    z-index: 10;
    margin: 0;
}

/* Responsive */
@media (max-width: 900px) {
    .bento-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: auto;
    }
    
    .bento-card, .bento-card.large, .bento-card.wide {
        grid-column: span 1;
        grid-row: span 1;
        min-height: 200px;
    }
    
    .hero-centered h1 {
        font-size: 2.5rem;
    }
}

/* User Manual Styles */
.manual-page {
    background-color: var(--bg-color);
    background-image: radial-gradient(circle, rgba(0, 0, 0, 0.15) 1px, transparent 1px);
    background-size: 20px 20px;
    background-position: 0 0;
    margin: 0;
    padding: 0;
    height: 100vh;
    overflow: hidden;
}

.manual-layout {
    display: flex;
    height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
}

.manual-sidebar {
    width: 250px;
    min-width: 250px;
    height: 100%;
    overflow-y: auto;
    padding: 2rem;
    border-right: 1px solid var(--card-border);
    background: rgba(250, 250, 250, 0.8);
    backdrop-filter: blur(10px);
    
    /* Hide scrollbar */
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}
.manual-sidebar::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.back-link {
    display: inline-block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent-color);
}

.nav-group {
    margin-bottom: 2rem;
}

.nav-group h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.nav-group a {
    display: block;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 0.4rem 0;
    transition: color 0.2s;
}

.nav-group a:hover,
.nav-group a.active {
    color: var(--accent-color);
    font-weight: 600;
}

.manual-content {
    flex: 1;
    overflow-y: auto;
    padding: 3rem 5rem;
    scroll-behavior: smooth;
    
    /* Hide scrollbar */
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}
.manual-content::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.manual-header {
    margin-bottom: 4rem;
}

.version-badge {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--card-hover);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
}

.manual-header h1 {
    font-size: 3rem;
    margin: 1rem 0;
}

.intent-banner {
    background: linear-gradient(135deg, rgba(192, 97, 203, 0.1) 0%, rgba(36, 36, 36, 0.02) 100%);
    border: 1px solid rgba(192, 97, 203, 0.3);
    padding: 1.5rem;
    border-radius: 12px;
    color: var(--text-primary);
    line-height: 1.6;
}

.manual-section {
    margin-bottom: 4rem;
    padding-top: 1rem;
}

.manual-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.manual-section ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.manual-section ul li {
    margin-bottom: 0.5rem;
}

.manual-section hr {
    border: 0;
    border-top: 1px solid var(--card-border);
    margin: 3rem 0;
}

.shortcut-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
}

kbd {
    background: linear-gradient(180deg, #ffffff 0%, #f0f0f0 100%);
    border: 1px solid #ccc;
    border-bottom-width: 2px;
    border-radius: 6px;
    padding: 0.3rem 0.6rem;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    color: #333;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

@media (max-width: 768px) {
    /* Manual Page Styles */
    .manual-layout {
        flex-direction: column;
    }
    
    .manual-sidebar {
        width: 100%;
        height: auto;
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--card-border);
    }
    
    .manual-content {
        padding: 2rem;
    }

    /* Main Page Mobile Styles */
    .nav-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-centered {
        margin: 3rem auto 2rem;
        padding: 0 1rem;
    }
    
    .hero-centered h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .bento-card.large, .bento-card.wide {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .bento-section {
        margin: 4rem auto;
        padding: 0 1rem;
    }
    
    .carousel-section {
        margin: 4rem auto;
        padding: 0 1rem;
    }
    
    .carousel-container {
        height: 400px;
    }
    
    .slide-placeholder {
        height: 250px;
    }
}