/* ===========================
   Theme & Design System Tokens
   =========================== */
:root {
    --color-bg: #0D0D0D; --color-surface: #1A1A1A; --color-text: #E8E4DF;
    --color-text-muted: #8A8580; --color-accent: #D4A853; --color-accent-hover: #E0B86A;
    --color-code: #7B9EB8; --color-border: #2A2A2A; --color-border-hover: #3A3A3A;
    --color-success: #6BA368;
    --font-heading: 'Space Grotesk', system-ui, sans-serif;
    --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --font-mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', monospace;
    --space-xs: 0.25rem; --space-sm: 0.5rem; --space-md: 1rem;
    --space-lg: 1.5rem; --space-xl: 2.5rem; --space-2xl: 4rem;
    --space-3xl: 6rem; --space-section: 4rem;
    --radius-sm: 4px; --radius-md: 6px; --radius-lg: 8px;
    --transition-fast: 150ms ease; --transition: 200ms ease;
    --max-width: 896px; --max-width-wide: 1140px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
}

code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--color-surface);
    padding: 0.15em 0.45em;
    border-radius: var(--radius-sm);
    color: var(--color-code);
    border: 1px solid var(--color-border);
    white-space: pre-wrap;
}

/* ===========================
   Layout
   =========================== */
.container {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    max-width: 500px;
    line-height: 1.7;
}

/* ===========================
   Header & Nav
   =========================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
}

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

.nav-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-accent);
    color: var(--color-bg);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    line-height: 1;
}

.nav-links {
    display: none;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition);
    letter-spacing: 0.01em;
    font-family: var(--font-body);
}

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

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav dropdown */
.nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(13, 13, 13, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    gap: var(--space-md);
}

@media (min-width: 640px) {
    :root { --space-section: 5rem; }
    .nav-links {
        display: flex;
    }
    .nav-toggle {
        display: none;
    }
}

/* ===========================
   Hero
   =========================== */
.hero {
    padding: var(--space-2xl) 0 var(--space-3xl);
    overflow: hidden;
}

.hero .container {
    display: grid;
    gap: var(--space-xl);
    align-items: start;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-md);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-label::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--color-accent);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.04em;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.hero h1 em {
    font-style: italic;
    color: var(--color-accent);
}

.hero-description {
    font-size: clamp(1.05rem, 2vw, 1.2rem);
    color: var(--color-text-muted);
    max-width: 440px;
    margin-bottom: var(--space-lg);
    line-height: 1.75;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: filter var(--transition), color var(--transition), border-color var(--transition);
    cursor: pointer;
    border: none;
    letter-spacing: 0.01em;
}

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

.btn-primary:hover {
    filter: brightness(1.25);
    color: var(--color-bg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-muted);
    border: 1.5px solid var(--color-border-hover);
}

.btn-secondary:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
    filter: brightness(1.25);
}

/* Terminal */
.terminal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.8;
    border: 1px solid var(--color-border);
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--color-border);
}

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

.terminal-dot:nth-child(1) { background: #ff5f57; }
.terminal-dot:nth-child(2) { background: #febc2e; }
.terminal-dot:nth-child(3) { background: #28c840; }

.terminal-title {
    margin-left: auto;
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

.terminal-body {
    padding: var(--space-md);
}

.terminal-body p {
    margin-bottom: 0.75rem;
}

.terminal-body p:last-child {
    margin-bottom: 0;
}

.terminal-prompt {
    color: var(--color-text);
}

.terminal-user {
    color: var(--color-success);
    font-weight: 500;
}

.terminal-ai {
    color: var(--color-accent);
    font-weight: 500;
}

.terminal-response {
    color: var(--color-text);
}

.terminal-dim {
    color: var(--color-text-muted);
}

.terminal-success {
    color: var(--color-success);
    font-weight: 500;
}

.terminal-output {
    line-height: 2;
}

@media (min-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr 1.15fr;
        gap: var(--space-2xl);
    }

    .hero-terminal {
        margin-top: var(--space-lg);
    }
}

/* ===========================
   How It Works
   =========================== */
.how-it-works {
    padding: var(--space-section) 0;
    border-top: 1px solid var(--color-border);
}

.steps {
    display: grid;
    gap: var(--space-lg);
    counter-reset: step;
}

.step {
    padding: var(--space-lg) var(--space-lg) var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border);
    display: grid;
    gap: var(--space-sm);
    counter-increment: step;
    position: relative;
    padding-left: 4.5rem;
}

.step-number {
    position: absolute;
    left: 0;
    top: var(--space-lg);
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-border-hover);
    line-height: 1;
    letter-spacing: -0.03em;
    transition: color var(--transition);
}

.step:hover .step-number {
    color: var(--color-accent);
}

.step h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.step p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    max-width: 520px;
    line-height: 1.7;
}

@media (min-width: 640px) {
    :root { --space-section: 5rem; }
    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-xl);
    }

    .step {
        border-bottom: none;
        border-right: 1px solid var(--color-border);
        padding: 0;
        padding-right: var(--space-lg);
        padding-left: 0;
    }

    .step:last-child {
        border-right: none;
    }

    .step-number {
        position: static;
        margin-bottom: var(--space-sm);
    }
}

/* ===========================
   Features
   =========================== */
.features {
    padding: var(--space-section) 0;
    background: var(--color-surface);
}

.feature-grid {
    display: grid;
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.feature-card {
    padding: var(--space-lg);
    background: var(--color-bg);
    transition: border-color var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    border-color: var(--color-border-hover);
}

.feature-icon {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    display: inline-block;
    opacity: 0.8;
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.65;
}

@media (min-width: 640px) {
    :root { --space-section: 5rem; }
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===========================
   Stack Diagram
   =========================== */
.stack {
    padding: var(--space-section) 0;
}

.stack-diagram {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-width: 520px;
}

.stack-layer {
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-border);
    border-bottom: none;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: border-color var(--transition);
}

.stack-layer:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.stack-layer:last-child {
    border-bottom: 1px solid var(--color-border);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.stack-layer:hover {
    border-color: var(--color-border-hover);
}

.stack-label {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text);
    min-width: 140px;
    letter-spacing: 0.01em;
}

.stack-detail {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ===========================
   Live Sites
   =========================== */
.sites {
    padding: var(--space-section) 0;
    background: var(--color-surface);
}

.sites-grid {
    display: grid;
    gap: var(--space-md);
}

.site-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    transition: border-color var(--transition);
    color: var(--color-text);
    gap: var(--space-md);
}

.site-card:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

.site-domain {
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
}

.site-description {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-align: right;
}

.site-card::after {
    content: '\2192';
    font-size: 1.125rem;
    color: var(--color-text-muted);
    transition: color var(--transition);
    flex-shrink: 0;
}

.site-card:hover::after {
    color: var(--color-accent);
}

@media (max-width: 639px) {
    .site-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-description {
        text-align: left;
    }

    .site-card::after {
        display: none;
    }
}

/* ===========================
   CTA Section
   =========================== */
.cta {
    padding: var(--space-section) 0;
    position: relative;
}

.cta .container {
    max-width: 640px;
}

.cta h2 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.cta p {
    color: var(--color-text-muted);
    font-size: clamp(1rem, 2vw, 1.1rem);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.cta-install {
    max-width: 460px;
}

.terminal-small {
    transform: none;
}

.terminal-small .terminal-body {
    padding: var(--space-sm) var(--space-md);
}

/* ===========================
   Footer
   =========================== */
.site-footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-brand {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.footer-text {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.footer-text a {
    color: var(--color-text-muted);
}

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

/* ===========================
   Scroll Animations
   =========================== */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delays for grid children */
.feature-card.fade-in:nth-child(1) { transition-delay: 0s; }
.feature-card.fade-in:nth-child(2) { transition-delay: 0.06s; }
.feature-card.fade-in:nth-child(3) { transition-delay: 0.12s; }
.feature-card.fade-in:nth-child(4) { transition-delay: 0.18s; }
.feature-card.fade-in:nth-child(5) { transition-delay: 0.24s; }
.feature-card.fade-in:nth-child(6) { transition-delay: 0.3s; }

.step.fade-in:nth-child(1) { transition-delay: 0s; }
.step.fade-in:nth-child(2) { transition-delay: 0.1s; }
.step.fade-in:nth-child(3) { transition-delay: 0.2s; }

.stack-layer.fade-in:nth-child(odd):nth-child(1) { transition-delay: 0s; }
.stack-layer.fade-in:nth-child(odd):nth-child(3) { transition-delay: 0.06s; }
.stack-layer.fade-in:nth-child(odd):nth-child(5) { transition-delay: 0.12s; }
.stack-layer.fade-in:nth-child(odd):nth-child(7) { transition-delay: 0.18s; }
.stack-layer.fade-in:nth-child(odd):nth-child(9) { transition-delay: 0.24s; }