/* ═══════════════════════════════════════════════════════════════════
   AgentAZAll Landing Page — Investor-Grade Aesthetic

   Design principles:
   - White space signals confidence
   - Serif typography signals seriousness (Crimson Pro)
   - Monospace for code signals engineering depth (JetBrains Mono)
   - Black ink on cream paper — matches the engraving imagery
   - No gradients, no animations, no gimmicks
   - Every pixel earns its place
   ═══════════════════════════════════════════════════════════════════ */

/* ── Reset & Base ──────────────────────────────────────────────── */

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

:root {
    --paper:    #fafaf8;       /* warm off-white, like fine paper     */
    --ink:      #1a1a18;       /* near-black, like quality ink        */
    --ink-soft: #4a4a46;       /* lighter ink for secondary text      */
    --ink-faint:#8a8a84;       /* very light, for tertiary elements   */
    --rule:     #d4d4ce;       /* thin rule lines, like engraving border */
    --code-bg:  #f0f0ec;       /* code block background               */
    --accent:   #2c4a6e;       /* deep ink blue — one accent only     */
    --serif:    'Crimson Pro', 'Georgia', 'Times New Roman', serif;
    --mono:     'JetBrains Mono', 'Menlo', 'Consolas', monospace;
    --max-w:    1120px;
    --gutter:   clamp(1.5rem, 4vw, 4rem);
}

html {
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--serif);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.7;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}
a:hover {
    border-bottom-color: var(--accent);
}

code {
    font-family: var(--mono);
    font-size: 0.85em;
}

/* ── Header ────────────────────────────────────────────────────── */

header {
    border-bottom: 1px solid var(--rule);
}

nav {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 1.2rem var(--gutter);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wordmark {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
    color: var(--ink);
}

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

.nav-links a {
    font-size: 0.85rem;
    color: var(--ink-soft);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    font-weight: 400;
}
.nav-links a:hover {
    color: var(--ink);
}

.nav-status {
    opacity: 0.6;
}

/* ── Hero ──────────────────────────────────────────────────────── */

.hero {
    border-bottom: 1px solid var(--rule);
}

.hero-content {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter) 4rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero h1 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.15;
    letter-spacing: -0.01em;
    color: var(--ink);
    margin-bottom: 1.5rem;
}

.hero-sub {
    font-size: 1.1rem;
    color: var(--ink-soft);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
}

.install-cmd {
    font-family: var(--mono);
    font-size: 0.9rem;
    background: var(--ink);
    color: var(--paper);
    padding: 0.7rem 1.4rem;
    border-radius: 4px;
    display: inline-block;
    letter-spacing: 0.01em;
    user-select: all;
}

.btn-primary {
    font-family: var(--serif);
    font-size: 0.9rem;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.6rem 1.6rem;
    border-radius: 4px;
    letter-spacing: 0.03em;
    transition: background 0.2s ease, color 0.2s ease;
}
.btn-primary:hover {
    background: var(--accent);
    color: var(--paper);
    border-bottom-color: transparent;
}

.hero-image img {
    width: 100%;
    /* The engraving should breathe — subtle shadow like a plate print */
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.06));
}

/* ── Metrics ───────────────────────────────────────────────────── */

.metrics {
    border-bottom: 1px solid var(--rule);
    background: var(--ink);
    color: var(--paper);
}

.metrics-grid {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 3.5rem var(--gutter);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.metric {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.metric-value {
    font-family: var(--serif);
    font-weight: 300;
    font-size: 2.8rem;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.metric-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
}

.metric-detail {
    font-size: 0.75rem;
    opacity: 0.45;
    font-style: italic;
    margin-top: 0.2rem;
}

/* ── Thesis ────────────────────────────────────────────────────── */

.thesis {
    border-bottom: 1px solid var(--rule);
}

.thesis-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 5rem var(--gutter);
}

.thesis-content p {
    font-size: 1.15rem;
    line-height: 1.85;
    color: var(--ink-soft);
    margin-bottom: 1.5rem;
}

.thesis-content p:first-child {
    color: var(--ink);
    font-size: 1.25rem;
}

/* ── Diagrams (How It Works) ───────────────────────────────────── */

.diagrams {
    border-bottom: 1px solid var(--rule);
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter) 3rem;
}

.diagrams h2 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: 2rem;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
}

.diagram-row {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 3rem;
    align-items: center;
    padding: 3rem 0;
    border-top: 1px solid var(--rule);
}

.diagram-row:first-of-type {
    margin-top: 2rem;
}

.diagram-row-reverse {
    grid-template-columns: 1.3fr 1fr;
}

.diagram-row-reverse .diagram-text {
    order: 2;
}

.diagram-row-reverse .diagram-svg {
    order: 1;
}

.diagram-text h3 {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
    color: var(--ink);
}

.diagram-text p {
    font-size: 0.95rem;
    color: var(--ink-soft);
    line-height: 1.75;
    margin-bottom: 0.8rem;
}

.diagram-insight {
    font-size: 0.88rem !important;
    color: var(--ink-faint) !important;
    font-style: italic;
    border-left: 2px solid var(--rule);
    padding-left: 1rem;
    margin-top: 0.5rem;
}

.diagram-svg {
    background: var(--paper);
}

.diagram-svg svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
}

/* ── Architecture / Transports ─────────────────────────────────── */

.architecture {
    border-bottom: 1px solid var(--rule);
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
}

.architecture h2,
.memory h2,
.relay h2,
.selfhost h2,
.integration h2,
.cta h2 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: 2rem;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
}

.section-sub {
    color: var(--ink-soft);
    font-size: 1rem;
    margin-bottom: 3rem;
    font-style: italic;
}

.transports {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.transport {
    border: 1px solid var(--rule);
    padding: 2rem;
    border-radius: 2px;
}

.transport-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.transport-year {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-faint);
    letter-spacing: 0.05em;
}

.transport h3 {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 1.3rem;
}

.transport-proto {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-faint);
    margin-bottom: 1.2rem;
    letter-spacing: 0.02em;
}

.transport ul {
    list-style: none;
    padding: 0;
}

.transport li {
    font-size: 0.88rem;
    color: var(--ink-soft);
    line-height: 1.6;
    padding-left: 1rem;
    position: relative;
    margin-bottom: 0.3rem;
}

.transport li::before {
    content: '\2014';   /* em dash */
    position: absolute;
    left: 0;
    color: var(--ink-faint);
    font-size: 0.7rem;
}

.transport-img {
    margin-top: 1.5rem;
    border-top: 1px solid var(--rule);
    padding-top: 1.5rem;
    opacity: 0.85;
}

/* ── Memory ────────────────────────────────────────────────────── */

.memory {
    border-bottom: 1px solid var(--rule);
}

.memory-layout {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.memory-text p {
    color: var(--ink-soft);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.memory-detail {
    font-size: 0.9rem !important;
    color: var(--ink-faint) !important;
}

.memory-image img {
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.06));
}

/* ── Code Blocks ───────────────────────────────────────────────── */

.code-block {
    background: var(--code-bg);
    border: 1px solid var(--rule);
    border-radius: 2px;
    padding: 1.5rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.code-block pre {
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--ink);
}

.code-block .c {
    color: var(--ink-faint);
    font-style: italic;
}

.code-block-wide {
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

/* ── Relay ─────────────────────────────────────────────────────── */

.relay {
    border-bottom: 1px solid var(--rule);
    background: #f5f5f1;
}

.relay-layout {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

.relay-image img {
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.06));
}

.relay-text p {
    color: var(--ink-soft);
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

.relay-specs {
    display: grid;
    gap: 0;
}

.spec {
    display: grid;
    grid-template-columns: 140px 1fr;
    border-bottom: 1px solid var(--rule);
    padding: 0.6rem 0;
}

.spec:last-child {
    border-bottom: none;
}

.spec-key {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-faint);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.spec-val {
    font-size: 0.9rem;
    color: var(--ink);
}

/* ── Self-Host ─────────────────────────────────────────────────── */

.selfhost {
    border-bottom: 1px solid var(--rule);
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
}

.selfhost-layout {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 3rem;
    align-items: center;
}

.selfhost-image img {
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.06));
}

/* ── Integration ───────────────────────────────────────────────── */

.integration {
    border-bottom: 1px solid var(--rule);
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
    text-align: center;
}

/* ── CTA ───────────────────────────────────────────────────────── */

.cta {
    border-bottom: 1px solid var(--rule);
    background: var(--ink);
    color: var(--paper);
}

.cta-content {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
    text-align: center;
}

.cta h2 {
    color: var(--paper);
    margin-bottom: 3rem;
}

.cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    text-align: left;
}

.cta-option h3 {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--paper);
    margin-bottom: 1rem;
    letter-spacing: 0.01em;
}

.cta-option p {
    color: rgba(250, 250, 248, 0.5);
    font-size: 0.88rem;
    font-style: italic;
}

.cta .code-block {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.12);
}

.cta .code-block pre {
    color: var(--paper);
}

.cta .code-block .c {
    color: rgba(250, 250, 248, 0.35);
}

/* ── Footer ────────────────────────────────────────────────────── */

footer {
    background: #f2f2ee;
}

.footer-content {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 4rem var(--gutter) 3rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 2rem;
}

.footer-col h4 {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-faint);
    margin-bottom: 1rem;
}

.footer-col a {
    display: block;
    font-size: 0.88rem;
    color: var(--ink-soft);
    margin-bottom: 0.5rem;
}

.footer-legal {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
}

.impressum h4 {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-faint);
    margin-bottom: 0.5rem;
}

.impressum p {
    font-size: 0.8rem;
    color: var(--ink-faint);
    line-height: 1.6;
}

.footer-note p {
    font-size: 0.78rem;
    color: var(--ink-faint);
    text-align: right;
}

/* ═══════════════════════════════════════════════════════════════════
   Responsive — graceful degradation, not mobile-first gimmicks
   ═══════════════════════════════════════════════════════════════════ */

@media (max-width: 900px) {
    .hero-content {
        grid-template-columns: 1fr;
        padding: 3rem var(--gutter);
        gap: 2rem;
    }
    .hero-image {
        order: -1;
        max-width: 500px;
    }
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .transports {
        grid-template-columns: 1fr;
    }
    .diagram-row,
    .diagram-row-reverse {
        grid-template-columns: 1fr;
    }
    .diagram-row-reverse .diagram-text {
        order: 1;
    }
    .diagram-row-reverse .diagram-svg {
        order: 2;
    }
    .diagram-svg {
        max-width: 560px;
    }
    .memory-layout,
    .relay-layout,
    .selfhost-layout {
        grid-template-columns: 1fr;
    }
    .relay-image {
        order: -1;
    }
    .cta-grid {
        grid-template-columns: 1fr;
    }
    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .footer-legal {
        flex-direction: column;
    }
    .footer-note p {
        text-align: left;
    }
}

@media (max-width: 600px) {
    html {
        font-size: 16px;
    }
    .metrics-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    .metric-value {
        font-size: 2rem;
    }
    .nav-links {
        gap: 1rem;
    }
    .nav-status {
        display: none;
    }
    .spec {
        grid-template-columns: 100px 1fr;
    }
}

/* ── Print styles — because serious people print things ───────── */

@media print {
    .metrics {
        background: white;
        color: black;
    }
    .cta {
        background: white;
        color: black;
    }
    .install-cmd {
        background: #eee;
        color: black;
    }
    a {
        color: black;
    }
    .code-block {
        border: 1px solid #ccc;
    }
}