/* ===========================
   Design 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: clamp(4rem, 8vw, 7rem);

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;

    --transition-fast: 150ms ease;
    --transition: 200ms ease;
    --max-width: 896px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text);
}

h1 { font-size: 2rem; font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; font-weight: 600; line-height: 1.2; }
h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.3; }

/* ===========================
   Layout
   =========================== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: var(--space-section) 0;
}

/* ===========================
   Header & Nav
   =========================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 13, 13, 0.9);
    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: 56px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}
.nav-logo:hover { color: var(--color-text); }

.logo-dot { color: var(--color-accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    font-family: var(--font-heading);
    font-size: 0.85rem;
}
.nav-links a { color: var(--color-text-muted); }
.nav-links a:hover { color: var(--color-text); }

@media (max-width: 640px) {
    .nav-links { display: none; }
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: filter var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    text-decoration: none;
}

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

.btn-outline {
    border-color: var(--color-border);
    color: var(--color-text);
    background: transparent;
}
.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ===========================
   Hero
   =========================== */
.hero {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.hero h1 {
    max-width: 700px;
    margin: 0 auto;
}

.hero-sub {
    margin-top: var(--space-md);
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    margin-top: var(--space-xl);
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===========================
   How It Works
   =========================== */
.section-intro {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

.flow {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.flow-step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.flow-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.flow-content h3 {
    margin-bottom: var(--space-xs);
}

.flow-content p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ===========================
   Features
   =========================== */
.features h2 {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

/* ===========================
   Cards
   =========================== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color var(--transition);
}
.card:hover {
    border-color: var(--color-border-hover);
}

.card h3 {
    margin-bottom: var(--space-xs);
}

.card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ===========================
   Architecture
   =========================== */
.architecture h2 {
    margin-bottom: var(--space-xl);
}

.terminal {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: 640px;
}

.terminal-bar {
    display: flex;
    gap: 6px;
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.terminal-bar span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border-hover);
}

.terminal-body {
    padding: 1.25rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.8;
}

.t-prompt { color: var(--color-code); }
.t-claude { color: var(--color-text); }
.t-muted { color: var(--color-text-muted); }
.t-accent { color: var(--color-accent); }
.t-success { color: var(--color-success); }

/* ===========================
   Install
   =========================== */
.install h2 {
    margin-bottom: var(--space-sm);
}

.install .section-intro {
    margin-bottom: var(--space-xl);
}

.install-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.install-step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.step-content {
    flex: 1;
    min-width: 0;
}

.step-label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.step-note {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

/* ===========================
   Code Blocks
   =========================== */
code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
    color: var(--color-code);
}

.code-block {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-code);
    overflow-x: auto;
}

.code-block code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
    color: inherit;
}

.copy-btn {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
}
.copy-btn:hover { color: var(--color-accent); }
.copy-btn.copied { color: var(--color-success); }

/* ===========================
   Footer
   =========================== */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}
.site-footer a { color: var(--color-text-muted); }
.site-footer a:hover { color: var(--color-text); }

/* ===========================
   Responsive
   =========================== */
@media (min-width: 640px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
    body { font-size: 1.0625rem; }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}