/* ===========================
   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;
    --max-width-wide: 1140px;
}

/* ===========================
   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, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    height: 4rem;
    gap: var(--space-lg);
}

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-text);
    white-space: nowrap;
    flex-shrink: 0;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    margin-right: -1.5rem;
    padding-right: 1.5rem;
    mask-image: linear-gradient(to right, black calc(100% - 2rem), transparent);
    -webkit-mask-image: linear-gradient(to right, black calc(100% - 2rem), transparent);
}

.nav-links::-webkit-scrollbar {
    display: none;
}

.nav-links a {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    white-space: nowrap;
}

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

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.9375rem;
    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);
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

/* ===========================
   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;
}

/* ===========================
   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;
}

/* ===========================
   About
   =========================== */
.about h2 {
    margin-bottom: var(--space-md);
}

.about p {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    max-width: 650px;
    line-height: 1.8;
}

/* ===========================
   CTA
   =========================== */
.cta {
    text-align: center;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.cta h2 {
    margin-bottom: var(--space-sm);
}

.cta p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   Code & Terminal
   =========================== */
pre, .terminal {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
    color: var(--color-text);
    white-space: pre-wrap;
    word-break: break-word;
}

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);
}

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

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

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

/* ===========================
   Animations
   =========================== */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        opacity: 0;
        transform: translateY(16px);
        transition: opacity 0.5s ease, transform 0.5s ease;
    }

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

/* ===========================
   Responsive — 640px+
   =========================== */
@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(auto-fit, minmax(260px, 1fr));
    }
}

/* ===========================
   Mindframe page-specific
   =========================== */

.eyebrow, .section-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

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

.lead {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 42rem;
    margin: var(--space-md) auto var(--space-xl);
}

.cta-row {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

.btn-secondary {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-live {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.live-dot {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: #2ecc71;
    box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.6);
    animation: live-pulse 1.8s ease-out infinite;
}

@keyframes live-pulse {
    0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.55); }
    70% { box-shadow: 0 0 0 0.5rem rgba(46, 204, 113, 0); }
    100% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); }
}

.section {
    padding: var(--space-section) 0;
    border-top: 1px solid var(--color-border);
}

.section-alt {
    background: var(--color-surface);
}

.section h2 {
    max-width: 38rem;
    margin-bottom: var(--space-2xl);
}

.steps {
    display: grid;
    gap: var(--space-xl);
}

.step {
    padding: var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.step-num, .install-num {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.step h3, .pitch h3, .install-body h3 {
    margin-bottom: var(--space-sm);
}

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

.pitch {
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border);
}

.pitch h3 em {
    font-style: italic;
    color: var(--color-accent);
}

.agent-install {
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
    background: var(--color-bg);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
}

.agent-install h3 {
    margin-bottom: 0.25rem;
}

.agent-install > p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.install-step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.install-step:first-of-type {
    border-top: none;
}

.install-num {
    font-size: 1rem;
    padding-top: 0.25rem;
}

.install-body {
    min-width: 0;
}

.code-block {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    margin: var(--space-md) 0 var(--space-sm);
    overflow-x: auto;
}

.code-block code {
    color: var(--color-code);
    white-space: nowrap;
}

.step-note {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.step-note code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-code);
    padding: 0 0.25rem;
}

.powered-by {
    margin-top: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

@media (min-width: 640px) {
    .steps {
        grid-template-columns: repeat(3, 1fr);
    }
    .pitch-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.code-block {
    justify-content: space-between;
}

.code-block code {
    flex: 1;
    min-width: 0;
    overflow-x: auto;
}

.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: inline-flex;
    align-items: center;
}

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

.copy-btn.copied {
    color: var(--color-success);
}

/* ===========================
   Mobile nav toggle
   =========================== */

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 28px;
    height: 22px;
    padding: 0;
    flex-direction: column;
    justify-content: space-between;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

@media (max-width: 639px) {
    .nav-toggle {
        display: flex;
    }
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-lg);
        background: var(--color-surface);
        border-top: 1px solid var(--color-border);
        transform: translateY(-8px);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition), transform var(--transition);
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .site-header {
        position: relative;
    }

    /* Hero: tighten for mobile */
    .hero {
        padding: var(--space-2xl) 0;
    }
    h1 {
        font-size: 1.75rem;
    }
    .lead {
        font-size: 1rem;
    }

    /* Stack install-step number above body on mobile */
    .install-step {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    .install-num {
        padding-top: 0;
    }

    /* Stack CTA buttons full-width on mobile */
    .cta-row {
        flex-direction: column;
        align-items: stretch;
    }
    .cta-row .btn {
        width: 100%;
        text-align: center;
    }
    .btn-live {
        justify-content: center;
    }
}

/* Fade-in animation (the base design system defines .fade-in, but target list
   differs per page — these classes get .fade-in added via main.js) */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   Architecture diagram
   =========================== */
.arch-intro {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    max-width: 40rem;
    margin-top: calc(-1 * var(--space-lg));
    margin-bottom: var(--space-2xl);
}

.arch {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.arch-cap,
.arch-tag {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-accent);
}

/* sources */
.arch-sources {
    text-align: center;
}

.arch-cap {
    display: block;
    margin-bottom: var(--space-sm);
}

.arch-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.arch-chip {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.3rem 0.85rem;
}

/* flow connectors */
.arch-pipe {
    width: 2px;
    height: 2.5rem;
    flex-shrink: 0;
    background: linear-gradient(var(--color-border-hover), var(--color-accent));
}

.arch-pipe--sm {
    height: 1.25rem;
    background: var(--color-border-hover);
}

/* the two lanes */
.arch-lanes {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    width: 100%;
}

.arch-lane {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.arch-lane-head {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
}

.arch-lane-name {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-text);
}

.arch-lane-sub {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

/* a node in a lane */
.arch-node {
    width: 100%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.7rem 0.9rem;
    text-align: center;
    transition: border-color var(--transition-fast);
}

.arch-node:hover {
    border-color: var(--color-border-hover);
}

.arch-node-name {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    color: var(--color-text);
}

.arch-node-desc {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-muted);
}

.arch-node--out {
    border-color: var(--color-accent);
}

.arch-node--out .arch-node-name {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-accent);
}

/* the separation note */
.arch-split {
    max-width: 36rem;
    margin-top: var(--space-lg);
    font-size: 0.875rem;
    font-style: italic;
    text-align: center;
    color: var(--color-text-muted);
}

/* the knowledge-base foundation */
.arch-base {
    width: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

.arch-base-name {
    display: block;
    margin-top: 0.15rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-text);
}

.arch-base-desc {
    max-width: 44rem;
    margin: var(--space-sm) auto 0;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

@media (min-width: 640px) {
    .arch-lanes {
        grid-template-columns: 1fr 1fr;
    }
}

/* ===========================
   Schema — layers + doc page
   =========================== */
.layers {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.layer {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color var(--transition);
}

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

.layer-tag {
    display: block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-accent);
}

.layer-q {
    display: block;
    margin-top: 0.1rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.layer-ex {
    display: block;
    margin-top: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.schema-note {
    max-width: 44rem;
    margin: var(--space-lg) 0 var(--space-xl);
    color: var(--color-text-muted);
}

/* documentation tables (schema page) */
.doc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
    margin: var(--space-md) 0 var(--space-xl);
}

.doc-table th,
.doc-table td {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.doc-table th {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.doc-table td {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.doc-table td:first-child {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text);
    white-space: nowrap;
}

/* prose blocks on the schema page */
.doc-section h3 {
    margin: var(--space-xl) 0 var(--space-sm);
}

.doc-section p {
    color: var(--color-text-muted);
    max-width: 44rem;
    margin-bottom: var(--space-md);
}

.doc-section pre {
    margin: var(--space-md) 0 var(--space-xl);
}

@media (min-width: 560px) {
    .layers {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .layers {
        grid-template-columns: repeat(4, 1fr);
    }
}