:root {
    /* Japanese-inspired color palette */
    --bg-primary: #faf9f7;        /* Kinari - raw silk */
    --bg-secondary: #f5f3ef;      /* Light sumi */
    --bg-tertiary: #edeae4;       /* Ivory */
    --bg-card: #ffffff;
    --bg-card-hover: #fdfcfa;

    --text-primary: #2d2a26;      /* Sumi ink */
    --text-secondary: #6b6560;    /* Nezumi gray */
    --text-muted: #9b9590;        /* Silver gray */

    --accent-indigo: #3d5a80;     /* Ai-iro */
    --accent-sakura: #e8a9b0;     /* Sakura pink */
    --accent-matcha: #7ba17b;     /* Matcha green */
    --accent-vermillion: #d05a4e; /* Shu-iro */
    --accent-gold: #c9a959;       /* Gold tea */
    --accent-wisteria: #8b7bac;   /* Fuji purple */

    --border-light: rgba(45, 42, 38, 0.08);
    --border-medium: rgba(45, 42, 38, 0.12);

    --shadow-sm: 0 1px 2px rgba(45, 42, 38, 0.04);
    --shadow-md: 0 4px 12px rgba(45, 42, 38, 0.06);
    --shadow-lg: 0 12px 40px rgba(45, 42, 38, 0.08);
    --shadow-hover: 0 8px 30px rgba(45, 42, 38, 0.1);

    --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Noto Serif JP', Georgia, serif;
    --font-mono: 'IBM Plex Mono', monospace;

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* Washi paper texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.3;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(250, 249, 247, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 28px;
    height: 28px;
    background: var(--accent-indigo);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-indigo);
    transition: width 0.3s var(--ease-out-expo);
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 2rem 6rem;
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    width: fit-content;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.1s forwards;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-matcha);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

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

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.hero-title-accent {
    background: linear-gradient(135deg, var(--accent-indigo) 0%, var(--accent-wisteria) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.3s forwards;
}

/* Terminal Box */
.terminal-box {
    background: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.4s forwards;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.terminal-box:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-light);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-dot.red { background: #f87171; }
.terminal-dot.yellow { background: #fbbf24; }
.terminal-dot.green { background: #4ade80; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.terminal-command {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow-x: auto;
}

.terminal-prompt {
    color: var(--accent-matcha);
    font-weight: 600;
}

.typing-text {
    color: var(--text-primary);
}

.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--accent-indigo);
    margin-left: 2px;
    animation: cursorBlink 1s infinite;
    vertical-align: text-bottom;
}

@keyframes cursorBlink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* CTA Buttons */
.cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.5s forwards;
}

.btn {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.85rem 1.75rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-indigo);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: #34506f;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-emoji {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 0.6s var(--ease-out-expo) forwards;
}

.section-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-indigo);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.75rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.section-description {
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    font-size: 1rem;
}

/* Features Controls */
.features-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.controls-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.layout-toggle,
.layout-action {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: calc(var(--radius-md) - 2px);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.layout-toggle:hover,
.layout-action:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.layout-toggle.is-active {
    background: var(--accent-indigo);
    color: white;
}

.layout-action {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
}

.layout-action:hover {
    background: var(--accent-wisteria);
    color: white;
    border-color: var(--accent-wisteria);
}

/* Features Container */
.features-container {
    perspective: 1000px;
    transform-style: preserve-3d;
    width: 100%;
    min-height: 500px;
    position: relative;
}

/* Grid Layout */
#features-root[data-layout="grid"] {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    align-items: flex-start;
}

/* List Layout */
#features-root[data-layout="list"] {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 700px;
    margin: 0 auto;
}

#features-root[data-layout="list"] .feature-card {
    flex-direction: row;
    width: 100%;
}

#features-root[data-layout="list"] .feature-card-image {
    width: 100px;
    height: 100px;
    flex-shrink: 0;
}

#features-root[data-layout="list"] .feature-card-type {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
}

/* Stripes Layout */
#features-root[data-layout="stripes"] {
    display: flex;
    flex-wrap: nowrap;
    gap: 0;
    width: 100%;
    height: 500px;
    padding: 0;
}

#features-root[data-layout="stripes"] .feature-card {
    flex: 1;
    max-width: none;
    height: 100%;
    border-radius: 0;
    margin-left: -1px;
}

#features-root[data-layout="stripes"] .feature-card:hover {
    z-index: 1;
    transform: translateY(-1rem);
}

#features-root[data-layout="stripes"] .feature-card-image {
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
}

#features-root[data-layout="stripes"] .feature-card-text {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    padding: 2rem 1rem 1rem;
}

#features-root[data-layout="stripes"] .feature-card-title {
    color: white;
    font-size: 1rem;
}

#features-root[data-layout="stripes"] .feature-card-intro,
#features-root[data-layout="stripes"] .feature-card-type {
    display: none;
}

/* Stack Layout */
#features-root[data-layout="stack"],
#features-root[data-layout="chaos"] {
    display: grid;
    place-content: center;
    height: 500px;
}

#features-root[data-layout="stack"] .feature-card {
    width: 280px;
    height: 320px;
    grid-area: 1/1;
}

#features-root[data-layout="stack"] .feature-card-intro {
    display: none;
}

/* Chaos Layout */
#features-root[data-layout="chaos"] .feature-card {
    width: 200px;
    grid-area: 1/1;
}

#features-root[data-layout="chaos"] .feature-card-intro {
    display: none;
}

/* Feature Card Base Styles */
.feature-card {
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    color: var(--text-primary);
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out, border-color 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    cursor: pointer;
}

.feature-card:hover {
    border-color: var(--accent-indigo);
    box-shadow: var(--shadow-hover);
    transform: scale(1.02);
}

.feature-card.is-open {
    visibility: hidden;
}

/* Card Color Variants */
.feature-card[data-color="1"] { --card-accent: var(--accent-matcha); }
.feature-card[data-color="2"] { --card-accent: var(--accent-wisteria); }
.feature-card[data-color="3"] { --card-accent: var(--accent-sakura); }
.feature-card[data-color="4"] { --card-accent: var(--accent-indigo); }
.feature-card[data-color="5"] { --card-accent: var(--accent-gold); }
.feature-card[data-color="6"] { --card-accent: var(--accent-vermillion); }

.feature-card-image {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.feature-card-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: conic-gradient(from 90deg at 1px 1px, transparent 90deg, var(--border-light) 0), var(--bg-secondary);
    background-size: 1.5rem 1.5rem;
    background-position: center;
}

.feature-card-icon {
    position: relative;
    width: 48px;
    height: 48px;
    object-fit: contain;
    z-index: 1;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s var(--ease-spring);
}

.feature-card-icon[src*="lucide"] {
    filter: brightness(0) saturate(100%) drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
    opacity: 0.7;
}

.feature-card:hover .feature-card-icon {
    transform: scale(1.15) translateY(-4px);
}

.feature-card-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.25rem;
    flex: 1;
}

.feature-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.feature-card-type {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    background: var(--card-accent, var(--bg-tertiary));
    color: white;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-weight: 600;
}

.feature-card-intro {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.feature-card-details {
    display: none;
}

.feature-card-details ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0;
    margin-top: 0.75rem;
}

.feature-card-details li {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    color: var(--text-muted);
}

/* Feature Overlay */
.feature-overlay {
    --overlay-alpha: 100%;
    pointer-events: none;
    overflow: visible;
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    max-width: none;
    max-height: none;
    border: none;
    padding: 0;
    background-color: color-mix(in srgb, var(--text-primary), transparent var(--overlay-alpha));
}

.feature-overlay[open] {
    --overlay-alpha: 50%;
    pointer-events: auto;
}

.feature-overlay::backdrop {
    background: transparent;
}

.feature-overlay .feature-card {
    overflow: auto;
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    max-height: calc(100vh - 4rem);
    cursor: default;
}

.feature-overlay .feature-card-image {
    aspect-ratio: 2/1;
}

.feature-overlay .feature-card-icon {
    width: 64px;
    height: 64px;
}

.feature-overlay .feature-card-text {
    padding: 1.5rem 2rem 2rem;
}

.feature-overlay .feature-card-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature-overlay .feature-card-type {
    margin-bottom: 1rem;
}

.feature-overlay .feature-card-intro {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.feature-overlay .feature-card-details {
    display: block;
}

.feature-overlay .close-overlay {
    position: absolute;
    top: -0.75rem;
    right: -0.75rem;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-medium);
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 10;
}

.feature-overlay .close-overlay:hover {
    background: var(--accent-vermillion);
    color: white;
    border-color: var(--accent-vermillion);
    transform: scale(1.1);
}

/* Responsive */
@media (max-width: 900px) {
    #features-root[data-layout="grid"] {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    #features-root[data-layout="grid"] {
        grid-template-columns: 1fr;
    }

    #features-root[data-layout="stripes"] {
        flex-wrap: wrap;
        height: auto;
    }

    #features-root[data-layout="stripes"] .feature-card {
        flex: 0 0 50%;
        height: 200px;
    }
}

/* Preview Section */
.preview {
    padding: 6rem 2rem;
    background: var(--bg-secondary);
    overflow: hidden;
}

.preview-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.preview-window {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    opacity: 0;
    transform: translateY(40px) scale(0.95);
}

.preview-titlebar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1.25rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-light);
}

.preview-titlebar-title {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.preview-content {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.5;
    overflow-x: auto;
    background: #1e1e2e;
    color: #cdd6f4;
    position: relative;
}

.preview-ascii {
    white-space: pre;
}

.preview-line {
    display: block;
    opacity: 0;
}

.preview-ascii .hl-blue { color: #89b4fa; }
.preview-ascii .hl-pink { color: #f5c2e7; }
.preview-ascii .hl-green { color: #a6e3a1; }
.preview-ascii .hl-yellow { color: #f9e2af; }
.preview-ascii .hl-mauve { color: #cba6f7; }

/* Floating particles for preview */
.preview-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-indigo);
    border-radius: 50%;
    opacity: 0;
}

/* Carousel */
.carousel-wrapper {
    position: relative;
}

.carousel-slides {
    position: relative;
    overflow: hidden;
}

.carousel-slide {
    display: none;
    opacity: 0;
}

.carousel-slide.active {
    display: block;
    opacity: 1;
}

.carousel-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.carousel-dots {
    display: flex;
    gap: 0.5rem;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-medium);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    padding: 0;
}

.carousel-dot.active {
    background: var(--accent-indigo);
    transform: scale(1.2);
}

.carousel-dot:hover {
    background: var(--accent-wisteria);
}

.carousel-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 1.25rem;
}

.carousel-btn:hover {
    background: var(--accent-indigo);
    color: white;
    border-color: var(--accent-indigo);
}

.carousel-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 100px;
    text-align: center;
}

/* Stack Section */
.stack {
    padding: 6rem 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1rem;
}

.stack-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1.25rem 1rem;
    text-align: center;
    transition: all 0.2s ease;
    cursor: default;
}

.stack-item:hover {
    border-color: var(--accent-indigo);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stack-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stack-icon img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    opacity: 0.8;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.stack-icon img[src*="lucide"] {
    filter: invert(25%) sepia(10%) saturate(500%) hue-rotate(180deg);
}

.stack-item:hover .stack-icon img {
    opacity: 1;
    transform: scale(1.1);
}

.stack-name {
    font-size: 0.85rem;
    font-weight: 500;
}

.stack-category {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* Quickstart Section */
.quickstart {
    padding: 6rem 2rem;
    background: var(--bg-secondary);
}

.quickstart-container {
    max-width: 700px;
    margin: 0 auto;
}

.quickstart-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.quickstart-step {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.5s var(--ease-out-expo);
}

.quickstart-step.visible {
    opacity: 1;
    transform: translateX(0);
}

.step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: var(--accent-indigo);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.9rem;
    color: white;
}

.step-content {
    flex: 1;
    padding-top: 0.25rem;
}

.step-title {
    font-weight: 600;
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.step-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.step-code {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.9rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    overflow-x: auto;
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.step-code-prompt {
    color: var(--accent-matcha);
    font-weight: 600;
}

.copy-btn {
    position: absolute;
    top: 50%;
    right: 0.75rem;
    transform: translateY(-50%);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 0.35rem 0.6rem;
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: var(--accent-indigo);
    color: white;
    border-color: var(--accent-indigo);
}

/* Callout */
.callout {
    background: rgba(61, 90, 128, 0.06);
    border-left: 3px solid var(--accent-indigo);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 1.25rem 1.5rem;
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.callout-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.callout-content {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.callout-content strong {
    color: var(--text-primary);
}

/* Footer */
footer {
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-light);
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

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

.footer-left a {
    color: var(--accent-indigo);
    text-decoration: none;
}

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

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
    nav {
        padding: 0.75rem 1rem;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 6rem 1.25rem 4rem;
    }

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

    .features, .preview, .stack, .quickstart {
        padding: 4rem 1.25rem;
    }

    /* Features controls - wrap on mobile */
    .features-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .controls-group.display-controls {
        flex-wrap: wrap;
        justify-content: center;
    }

    .layout-toggle,
    .layout-action {
        font-size: 0.7rem;
        padding: 0.4rem 0.75rem;
    }

    /* Preview ASCII - scale down for mobile */
    .preview-content {
        padding: 1rem;
        font-size: 0.55rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .preview-ascii {
        transform-origin: top left;
        min-width: max-content;
    }

    /* Stack section - force grid layout on mobile */
    .stack-controls {
        display: none;
    }

    .stack-scene {
        height: auto;
        min-height: 0;
        perspective: none;
    }

    .stack-grid,
    .stack-grid[data-layout="sphere"],
    .stack-grid[data-layout="helix"] {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
        position: relative !important;
        height: auto !important;
        transform: none !important;
    }

    .stack-grid .stack-item,
    .stack-grid[data-layout="sphere"] .stack-item,
    .stack-grid[data-layout="helix"] .stack-item {
        position: relative !important;
        left: auto !important;
        top: auto !important;
        margin: 0 !important;
        width: auto !important;
        height: auto !important;
        transform: none !important;
    }

    .stack-item {
        padding: 0.75rem 0.5rem;
    }

    .stack-icon {
        width: 24px;
        height: 24px;
        margin-bottom: 0.35rem;
    }

    .stack-icon img {
        width: 20px;
        height: 20px;
    }

    .stack-name {
        font-size: 0.7rem;
    }

    .stack-category {
        font-size: 0.6rem;
    }

    /* Quickstart - fix long command overflow */
    .quickstart-step {
        flex-direction: column;
        gap: 0.75rem;
    }

    .step-code {
        font-size: 0.65rem;
        word-break: break-all;
        white-space: normal;
        line-height: 1.6;
        padding-right: 3.5rem;
    }

    .copy-btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.6rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    /* Carousel navigation */
    .carousel-nav {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .carousel-label {
        order: 3;
        width: 100%;
        margin-top: 0.5rem;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .stack-grid,
    .stack-grid[data-layout="sphere"],
    .stack-grid[data-layout="helix"] {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .preview-content {
        font-size: 0.45rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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

    .section-title {
        font-size: 1.5rem;
    }
}

/* ===== New Animation Styles ===== */

/* Hero text split animation */
.hero-title .char {
    display: inline-block;
    opacity: 0;
}

.hero-title br + .char {
    display: inline;
}

/* Floating elements */
.floating-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: -1;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0;
    filter: blur(40px);
}

.floating-shape.shape-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-sakura), var(--accent-wisteria));
    top: 10%;
    right: -5%;
}

.floating-shape.shape-2 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--accent-matcha), var(--accent-indigo));
    top: 60%;
    left: -5%;
}

.floating-shape.shape-3 {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-vermillion));
    bottom: 20%;
    right: 10%;
}

/* Magnetic button effect */
.btn-magnetic {
    position: relative;
    transition: transform 0.1s ease-out;
}

.btn-magnetic .btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.1s ease-out;
}

/* Ripple effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    pointer-events: none;
}

/* Feature card - Anime.js style with 3D perspective */
.features-grid {
    perspective: 1200px;
}

.feature-card {
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    will-change: transform, opacity;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
                rgba(61, 90, 128, 0.15) 0%,
                transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 0;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 40%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 60%
    );
    transform: translateX(-100%) rotate(45deg);
    transition: transform 0.6s ease;
    pointer-events: none;
    z-index: 1;
}

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

.feature-card:hover::after {
    transform: translateX(100%) rotate(45deg);
}

.feature-card > * {
    position: relative;
    z-index: 2;
}

.feature-icon {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) translateY(-2px);
}

/* Stack section - 3D scene with layout transitions */
.stack {
    perspective: 1200px;
    overflow: visible;
}

.stack-controls {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.stack-toggle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.stack-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.stack-toggle.is-active {
    background: var(--accent-indigo);
    color: white;
    border-color: var(--accent-indigo);
}

.stack-scene {
    position: relative;
    width: 100%;
    height: 500px;
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out;
}

.stack-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    backface-visibility: hidden;
}

.stack-grid[data-layout="grid"] {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1rem;
    place-content: center;
    transform: translateZ(0);
}

.stack-grid[data-layout="grid"] .stack-item {
    position: relative;
    left: auto;
    top: auto;
    margin: 0;
}

.stack-grid[data-layout="sphere"],
.stack-grid[data-layout="helix"] {
    display: block;
    position: relative;
    width: 100%;
    height: 100%;
}

.stack-grid[data-layout="sphere"] .stack-item,
.stack-grid[data-layout="helix"] .stack-item {
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -65px;
    margin-top: -45px;
    width: 130px;
    height: 90px;
}

.stack-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1.25rem 1rem;
    text-align: center;
    transform-style: preserve-3d;
    will-change: transform, opacity;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.stack-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.15) 0%,
        transparent 50%,
        rgba(0, 0, 0, 0.05) 100%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.stack-item:hover {
    border-color: var(--accent-indigo);
    box-shadow: var(--shadow-hover);
    z-index: 10;
}

.stack-item:hover::after {
    opacity: 1;
}

.stack-item.is-expanded {
    position: fixed !important;
    left: 50% !important;
    top: 50% !important;
    transform: translate(-50%, -50%) translateZ(100px) !important;
    width: 280px;
    height: auto;
    padding: 2rem;
    z-index: 100;
    background: var(--bg-card);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.2);
}

.stack-item.is-expanded .stack-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
}

.stack-item.is-expanded .stack-icon img {
    width: 40px;
    height: 40px;
}

.stack-item.is-expanded .stack-name {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.stack-item.is-expanded .stack-category {
    font-size: 0.85rem;
}

/* Morphing background */
.morphing-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -2;
}

.morph-blob {
    position: absolute;
    width: 40vw;
    height: 40vw;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    mix-blend-mode: multiply;
}

/* Text gradient animation */
.animated-gradient {
    background: linear-gradient(
        90deg,
        var(--accent-indigo),
        var(--accent-wisteria),
        var(--accent-sakura),
        var(--accent-indigo)
    );
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Nav link underline animation */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-indigo);
    transition: width 0.3s var(--ease-out-expo), left 0.3s var(--ease-out-expo);
}

.nav-links a:hover::after {
    width: 100%;
    left: 0;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
}

.scroll-indicator-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.scroll-indicator-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-indigo), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-indicator-dot {
    width: 4px;
    height: 4px;
    background: var(--accent-indigo);
    border-radius: 50%;
    position: absolute;
    left: -1.5px;
    top: 0;
}

/* Glowing border animation */
.glow-border {
    position: relative;
}

.glow-border::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: calc(var(--radius-lg) + 2px);
    background: linear-gradient(
        45deg,
        transparent,
        var(--accent-indigo),
        var(--accent-wisteria),
        var(--accent-sakura),
        transparent
    );
    background-size: 400% 400%;
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.glow-border:hover::after {
    opacity: 0.5;
    animation: glowRotate 3s linear infinite;
}

@keyframes glowRotate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Counter animation for stats */
.stat-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-indigo);
}

/* Preview window shine effect */
.preview-window::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    z-index: 10;
    pointer-events: none;
}

.preview-window.shine::before {
    animation: shine 1.5s ease-in-out;
}

@keyframes shine {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Selection */
::selection {
    background: rgba(61, 90, 128, 0.2);
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}