/* objectfs.io — same house style as spore.host and provabl.dev:
   Atkinson Hyperlegible, a data-theme toggle persisted in localStorage, a sticky blurred nav over a
   1100px container, and accent-coloured cards. The accent here is amber rather than spore's blue or
   provabl's green, matching the deep-orange primary mkdocs.yml already uses for this project. */

/* Light theme (default) */
:root {
    --bg: #faf9f7;
    --bg-card: #ffffff;
    --bg-card-hover: #f5f3f0;
    --bg-code: #f4f2ef;
    --text-primary: #1c1917;
    --text-secondary: #57534e;
    --text-muted: #a8a29e;
    --text-code: #292524;

    --accent-amber: #c2410c;   /* primary — deep orange, per mkdocs.yml */
    --accent-blue: #0369a1;
    --accent-green: #15803d;
    --accent-purple: #6d28d9;
    --accent-teal: #0f766e;
    --accent-rose: #be123c;

    --accent-amber-soft: #ffedd5;
    --accent-blue-soft: #e0f2fe;
    --accent-green-soft: #dcfce7;
    --accent-purple-soft: #ede9fe;
    --accent-teal-soft: #ccfbf1;
    --accent-rose-soft: #ffe4e6;

    --accent-amber-mid: #fdba74;
    --accent-green-mid: #86efac;

    --border: #e7e5e4;
    --border-strong: #d6d3d1;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
    --nav-bg: rgba(250, 249, 247, 0.92);
}

[data-theme="dark"] {
    --bg: #0f0e0d;
    --bg-card: #1c1a18;
    --bg-card-hover: #262320;
    --bg-code: #161412;
    --text-primary: #ecebe9;
    --text-secondary: #a8a29e;
    --text-muted: #78716c;
    --text-code: #d6d3d1;

    --accent-amber: #fb923c;
    --accent-blue: #38bdf8;
    --accent-green: #4ade80;
    --accent-purple: #a78bfa;
    --accent-teal: #2dd4bf;
    --accent-rose: #fb7185;

    --accent-amber-soft: rgba(251, 146, 60, 0.12);
    --accent-blue-soft: rgba(56, 189, 248, 0.1);
    --accent-green-soft: rgba(74, 222, 128, 0.1);
    --accent-purple-soft: rgba(167, 139, 250, 0.1);
    --accent-teal-soft: rgba(45, 212, 191, 0.1);
    --accent-rose-soft: rgba(251, 113, 133, 0.1);

    --accent-amber-mid: #c2410c;
    --accent-green-mid: #15803d;

    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --nav-bg: rgba(15, 14, 13, 0.92);
}

.theme-transitioning,
.theme-transitioning *,
.theme-transitioning *::before,
.theme-transitioning *::after {
    transition: background-color 0.2s ease, color 0.2s ease,
                border-color 0.2s ease, box-shadow 0.2s ease !important;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text-primary);
    font-family: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0;
    margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}
.skip-link {
    position: absolute; left: -9999px; top: auto;
    width: 1px; height: 1px; overflow: hidden;
    z-index: 10000; padding: 0.75rem 1.25rem;
    background: var(--accent-amber); color: #fff;
    font-weight: 700; text-decoration: none; border-radius: 0 0 6px 0;
}
.skip-link:focus { position: fixed; left: 0; top: 0; width: auto; height: auto; }

/* ── Navigation ────────────────────────────────────── */
.nav {
    position: sticky; top: 0; z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.nav-container {
    max-width: 1100px; margin: 0 auto;
    padding: 0 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
    height: 58px;
}
.nav-brand {
    display: flex; align-items: center; gap: 0.5rem;
    text-decoration: none; color: var(--text-primary);
}
.nav-mark { width: 1.4rem; height: 1.4rem; flex-shrink: 0; }
.nav-wordmark {
    font-size: 1.5rem; font-weight: 800; letter-spacing: -0.03em;
}
.nav-wordmark .accent { color: var(--accent-amber); }

.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a {
    color: var(--text-secondary); text-decoration: none;
    font-size: 0.9rem; font-weight: 500; transition: color 0.15s;
}
.nav-links a:hover { color: var(--text-primary); }

.btn-theme {
    background: none; border: 1px solid var(--border);
    border-radius: 6px; padding: 0.35rem 0.65rem;
    cursor: pointer; color: var(--text-secondary);
    font-size: 0.95rem; transition: all 0.15s; line-height: 1;
}
.btn-theme:hover { border-color: var(--border-strong); color: var(--text-primary); }

.hamburger {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
    display: block; width: 22px; height: 2px;
    background: var(--text-primary); border-radius: 2px; transition: all 0.2s;
}

/* ── Layout ─────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

/* ── Hero ───────────────────────────────────────────── */
.hero { padding: 5rem 1rem 4.5rem; text-align: center; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.3rem 0.85rem;
    background: var(--accent-amber-soft);
    border: 1px solid var(--accent-amber-mid);
    border-radius: 100px;
    font-size: 0.78rem; font-weight: 700;
    color: var(--accent-amber);
    letter-spacing: 0.06em; text-transform: uppercase;
    margin-bottom: 1.75rem;
}
[data-theme="dark"] .hero-eyebrow { border-color: rgba(251, 146, 60, 0.25); }

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}
.hero h1 .accent { color: var(--accent-amber); }

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 1.75rem;
    line-height: 1.7;
}

.hero-props {
    display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem;
    justify-content: center;
    font-size: 0.875rem; color: var(--text-secondary);
    max-width: 720px; margin: 0 auto 2.25rem;
}
.hero-props span::before { content: "\2713\00a0\00a0"; color: var(--accent-green); font-weight: 700; }

.hero-buttons {
    display: flex; gap: 0.875rem;
    justify-content: center; flex-wrap: wrap;
    margin-bottom: 1.25rem;
}
.btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.65rem 1.4rem; border-radius: 7px;
    font-size: 0.925rem; font-weight: 600;
    text-decoration: none; transition: all 0.15s;
    border: none; cursor: pointer; font-family: inherit;
}
.btn-primary {
    background: var(--accent-amber); color: #fff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
    filter: brightness(1.08);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
    border-color: var(--accent-amber);
    color: var(--accent-amber);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.hero-trust { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 3rem; }

/* ── Terminal ───────────────────────────────────────── */
.terminal {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    max-width: 720px;
    margin: 0 auto;
    text-align: left;
}
.terminal-bar {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.7rem 1rem;
    background: rgba(0,0,0,0.04);
    border-bottom: 1px solid var(--border);
}
[data-theme="dark"] .terminal-bar { background: rgba(255,255,255,0.04); }
.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot.red    { background: #ff5f57; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green  { background: #28c840; }
.terminal-title { flex: 1; text-align: center; font-size: 0.75rem; color: var(--text-muted); }
.terminal-body {
    padding: 1.25rem 1.5rem;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
    font-size: 0.82rem; line-height: 1.85;
    color: var(--text-code);
}
.terminal-body pre { white-space: pre-wrap; word-break: break-word; }
.t-comment { color: var(--text-muted); }
.t-prompt  { color: var(--accent-green); font-weight: 700; }
.t-cmd     { color: var(--text-code); }
.t-flag    { color: var(--accent-blue); }
.t-out     { color: var(--text-muted); }
.t-ok      { color: var(--accent-green); }
.t-warn    { color: var(--accent-amber); }

/* ── Sections ───────────────────────────────────────── */
section { padding: 3.5rem 0 4.5rem; }
section + section { border-top: 1px solid var(--border); }
.section-header { text-align: center; margin-bottom: 2.75rem; }
.section-header h2 {
    font-size: 1.65rem; font-weight: 800;
    letter-spacing: -0.025em; margin-bottom: 0.4rem;
}
.section-header p {
    color: var(--text-secondary); font-size: 1rem;
    max-width: 620px; margin: 0 auto;
}

/* ── Card grid ──────────────────────────────────────── */
.card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 1fr;
    gap: 1.25rem;
}
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; grid-auto-rows: auto; } }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
    display: flex; flex-direction: column;
}
.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--border-strong);
}
.card-amber:hover  { border-color: var(--accent-amber); }
.card-blue:hover   { border-color: var(--accent-blue); }
.card-green:hover  { border-color: var(--accent-green); }
.card-purple:hover { border-color: var(--accent-purple); }
.card-teal:hover   { border-color: var(--accent-teal); }
.card-rose:hover   { border-color: var(--accent-rose); }

.card-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem; border-radius: 4px;
    font-size: 0.72rem; font-weight: 700;
    letter-spacing: 0.07em; text-transform: uppercase;
    margin-bottom: 0.875rem; width: fit-content;
}
.card-amber  .card-tag { background: var(--accent-amber-soft);  color: var(--accent-amber); }
.card-blue   .card-tag { background: var(--accent-blue-soft);   color: var(--accent-blue); }
.card-green  .card-tag { background: var(--accent-green-soft);  color: var(--accent-green); }
.card-purple .card-tag { background: var(--accent-purple-soft); color: var(--accent-purple); }
.card-teal   .card-tag { background: var(--accent-teal-soft);   color: var(--accent-teal); }
.card-rose   .card-tag { background: var(--accent-rose-soft);   color: var(--accent-rose); }

[data-theme="dark"] .card-tag { border: 1px solid var(--border-strong); }

.card h3 {
    font-size: 1.2rem; font-weight: 800;
    letter-spacing: -0.02em; margin-bottom: 0.5rem;
}
.card-amber  h3 { color: var(--accent-amber); }
.card-blue   h3 { color: var(--accent-blue); }
.card-green  h3 { color: var(--accent-green); }
.card-purple h3 { color: var(--accent-purple); }
.card-teal   h3 { color: var(--accent-teal); }
.card-rose   h3 { color: var(--accent-rose); }

.card p {
    color: var(--text-secondary); font-size: 0.9rem;
    line-height: 1.65; margin-bottom: 1.1rem;
}
.card ul { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; margin-top: auto; }
.card ul li {
    font-size: 0.85rem; color: var(--text-secondary);
    padding-left: 1.1rem; position: relative;
}
.card ul li::before { content: "\2014"; position: absolute; left: 0; color: var(--border-strong); }

code, pre { font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace; }
.card code, p code, li code {
    background: var(--bg-code); border: 1px solid var(--border);
    border-radius: 4px; padding: 0.1em 0.35em; font-size: 0.85em;
}

/* ── Honest-limits table ────────────────────────────── */
.limits { max-width: 820px; margin: 0 auto; }
.limits-row {
    display: grid; grid-template-columns: 1fr 1.6fr;
    gap: 1.5rem; padding: 1.1rem 0;
    border-bottom: 1px solid var(--border);
    align-items: baseline;
}
.limits-row:last-child { border-bottom: none; }
@media (max-width: 640px) { .limits-row { grid-template-columns: 1fr; gap: 0.35rem; } }
.limits-what { font-weight: 700; font-size: 0.95rem; }
.limits-what .marker { color: var(--accent-rose); margin-right: 0.4rem; font-weight: 800; }
.limits-why { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.65; }

/* ── Install ────────────────────────────────────────── */
.install { max-width: 820px; margin: 0 auto; }
.install-tabs { display: flex; gap: 0.25rem; }
.tab-btn {
    background: none; border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 7px 7px 0 0;
    padding: 0.5rem 1.1rem; font-size: 0.875rem;
    font-family: inherit; cursor: pointer;
    color: var(--text-secondary); transition: all 0.15s;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { background: var(--bg-code); color: var(--text-primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }
.install pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 0 7px 7px 7px;
    padding: 1.4rem 1.5rem; overflow-x: auto;
    font-size: 0.82rem; line-height: 1.85;
    color: var(--text-code);
}
.install-note {
    font-size: 0.875rem; color: var(--text-secondary);
    margin-top: 1.5rem; line-height: 1.7;
}
.install-note a { color: var(--accent-amber); }

/* ── Principles ─────────────────────────────────────── */
.principles-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 2rem 2.5rem; max-width: 940px; margin: 0 auto;
}
@media (max-width: 700px) { .principles-grid { grid-template-columns: 1fr; gap: 1.75rem; } }
.principle h3 {
    font-size: 1rem; font-weight: 800;
    letter-spacing: -0.01em; margin-bottom: 0.4rem;
}
.principle h3::before {
    content: "\2192\00a0\00a0"; color: var(--accent-amber);
}
.principle p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* ── Footer ─────────────────────────────────────────── */
footer { border-top: 1px solid var(--border); padding: 3rem 0 2rem; }
.footer-inner {
    max-width: 1100px; margin: 0 auto; padding: 0 1.5rem;
    display: flex; flex-wrap: wrap; gap: 2rem;
    justify-content: space-between; align-items: flex-start;
}
.footer-brand { font-weight: 800; font-size: 1.05rem; margin-bottom: 0.35rem; }
.footer-brand .accent { color: var(--accent-amber); }
.footer-tagline { font-size: 0.85rem; color: var(--text-secondary); }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.footer-links a {
    font-size: 0.875rem; color: var(--text-secondary);
    text-decoration: none; transition: color 0.15s;
}
.footer-links a:hover { color: var(--text-primary); }
.footer-bottom {
    max-width: 1100px; margin: 2rem auto 0; padding: 1.5rem 1.5rem 0;
    border-top: 1px solid var(--border);
    display: flex; flex-wrap: wrap; gap: 0.5rem;
    justify-content: space-between;
    font-size: 0.8rem; color: var(--text-muted);
}
.footer-bottom a { color: var(--text-secondary); text-decoration: none; }
.footer-bottom a:hover { color: var(--text-primary); }

/* ── Responsive nav ─────────────────────────────────── */
@media (max-width: 768px) {
    .nav-links {
        display: none; flex-direction: column;
        position: absolute; top: 58px; left: 0; right: 0;
        background: var(--bg); border-bottom: 1px solid var(--border);
        padding: 1rem 1.5rem; gap: 1rem;
    }
    .nav-links.open { display: flex; }
    .hamburger { display: flex; }
    .hero { padding: 3.5rem 1rem 3rem; }
    section { padding: 2.75rem 0 3.5rem; }
    .footer-inner { flex-direction: column; gap: 1.5rem; }
}