/*
 * Shared product-site stylesheet — turinglambdaai family design system.
 * Same token skeleton as taskly.jrtx.site; each site overrides the accent
 * variables in a small inline <style> block in its <head>.
 */

:root {
    --bg: #F5F5F7;
    --bg-card: #FFFFFF;
    --bg-elevated: #FFFFFF;
    --text: #1D1D1F;
    --text-2: #6E6E73;
    --text-3: #8E8E93;
    --accent: #007AFF;
    --accent-hover: #0066D6;
    --accent-soft: rgba(0, 122, 255, 0.14);
    --accent-tint: rgba(0, 122, 255, 0.08);
    --border: rgba(0, 0, 0, 0.10);
    --border-strong: rgba(0, 0, 0, 0.16);

    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-serif: "Newsreader", Georgia, serif;
    --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;

    --wrapper-width: 1080px;
    --radius-l: 20px;
    --radius-m: 14px;
    --radius-s: 10px;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.05), 0 14px 40px rgba(0, 0, 0, 0.09);
    --shadow-window: 0 30px 70px rgba(0, 0, 0, 0.13), 0 8px 20px rgba(0, 0, 0, 0.06);

    --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    letter-spacing: -0.011em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: var(--accent); transition: color 0.2s var(--ease); }
ul { list-style: none; }

::selection { background: var(--accent-soft); color: var(--text); }

/* ---------- Navigation ---------- */
.nav-container {
    position: sticky;
    top: 0;
    width: 100%;
    height: 56px;
    background: rgba(245, 245, 247, 0.78);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 9999;
}

.nav-wrapper {
    max-width: var(--wrapper-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 600;
    font-size: 21px;
    color: var(--text);
    letter-spacing: -0.02em;
}

.nav-logo { flex-shrink: 0; border-radius: 6px; }

.nav-menu { display: flex; gap: 28px; align-items: center; }

.nav-menu a {
    font-size: 14px;
    color: var(--text-2);
    font-weight: 450;
    transition: color 0.2s;
}
.nav-menu a:hover { color: var(--accent); }

/* Language dropdown */
.lang-dropdown-wrapper { position: relative; }
.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 14px;
    color: var(--text-2);
    padding: 6px 10px;
    border-radius: 8px;
    transition: all 0.2s var(--ease);
}
.lang-btn:hover { color: var(--accent); background: var(--accent-tint); }
.lang-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-s);
    box-shadow: var(--shadow-hover);
    padding: 6px;
    min-width: 130px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all 0.18s var(--ease);
    z-index: 10000;
}
.lang-dropdown-wrapper:hover .lang-menu,
.lang-dropdown-wrapper:focus-within .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.lang-menu li {
    padding: 7px 12px;
    font-size: 14px;
    color: var(--text);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s;
}
.lang-menu li:hover { background: var(--accent-tint); color: var(--accent); }

/* ---------- Layout ---------- */
.container { max-width: var(--wrapper-width); margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0; }

.eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 550;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 18px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 42px;
    line-height: 1.12;
    font-weight: 500;
    letter-spacing: -0.015em;
    color: var(--text);
    margin-bottom: 14px;
}
.section-title .accent { color: var(--accent); font-style: italic; }

.section-lead {
    font-size: 18px;
    color: var(--text-2);
    max-width: 640px;
    line-height: 1.65;
}

.text-center { text-align: center; }
.text-center .section-lead { margin: 0 auto; }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 64px; text-align: center; overflow: hidden; }

.hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(38px, 6vw, 62px);
    line-height: 1.08;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-bottom: 22px;
}
.hero h1 .accent { color: var(--accent); font-style: italic; }
.hero h1 span { display: block; }

.hero .lead {
    font-size: 19px;
    color: var(--text-2);
    max-width: 680px;
    margin: 0 auto 32px;
    line-height: 1.65;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.2s var(--ease);
    border: 1px solid transparent;
}
.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 6px 18px var(--accent-soft);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 26px var(--accent-soft);
}
.btn-secondary {
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border-strong);
    box-shadow: var(--shadow-card);
}
.btn-secondary:hover { color: var(--accent); border-color: var(--accent); }

.hero-visual {
    max-width: 900px;
    margin: 56px auto 0;
    position: relative;
}

/* ---------- Bento feature grid ---------- */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 48px;
}
.bento-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-l);
    padding: 28px;
    transition: all 0.25s var(--ease);
    box-shadow: var(--shadow-card);
}
.bento-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}
.bento-card.span-2 { grid-column: span 2; }
.bento-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin: 14px 0 6px;
    letter-spacing: -0.01em;
}
.bento-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.6; }
.card-icon {
    width: 42px;
    height: 42px;
    border-radius: 11px;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- Code windows (mac-style) ---------- */
.code-window {
    background: #1E1E22;
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-window);
    overflow: hidden;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.07);
}
.window-header {
    display: flex;
    align-items: center;
    padding: 11px 14px;
    background: rgba(255, 255, 255, 0.045);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.window-controls { display: flex; gap: 7px; }
.traffic-light { width: 11px; height: 11px; border-radius: 50%; }
.traffic-light.close { background: #FF5F57; }
.traffic-light.minimize { background: #FEBC2E; }
.traffic-light.maximize { background: #28C840; }
.window-title {
    flex: 1;
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.45);
    font-family: var(--font-mono);
    margin-right: 54px;
}
.code-body {
    padding: 20px 22px;
    font-family: var(--font-mono);
    font-size: 13.5px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.86);
    overflow-x: auto;
    white-space: pre;
}
.code-body .prompt { color: var(--accent-bright, #6CB6FF); user-select: none; }
.code-body .cmd { color: #FFFFFF; font-weight: 600; }
.code-body .str { color: #7EE2A8; }
.code-body .flag { color: #FEBC2E; }
.code-body .comment { color: rgba(255, 255, 255, 0.38); }
.code-body .ok { color: #7EE2A8; }
.code-body .kw { color: #C792EA; }
.code-body .dim { color: rgba(255, 255, 255, 0.5); }

/* ---------- Split view (two code panes side by side) ---------- */
.split-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-top: 48px;
}
.split-pane-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
    margin: 26px 0 10px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.split-view .split-pane-label { margin-top: 0; }

/* ---------- Compare table ---------- */
.compare-table-wrap {
    margin-top: 44px;
    overflow-x: auto;
    border-radius: var(--radius-l);
    border: 1px solid var(--border);
    background: var(--bg-card);
    box-shadow: var(--shadow-card);
}
table.compare {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    min-width: 620px;
}
.compare th, .compare td {
    padding: 13px 18px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.compare th {
    font-weight: 600;
    background: var(--accent-tint);
    color: var(--text);
    white-space: nowrap;
}
.compare td:first-child { font-weight: 550; color: var(--text-2); white-space: nowrap; }
.compare tr:last-child td { border-bottom: none; }
.compare td { color: var(--text); }
.compare .yes { color: var(--accent); font-weight: 600; }

/* ---------- Download / platform grid ---------- */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 44px;
}
.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-m);
    padding: 24px;
    text-align: center;
    transition: all 0.2s var(--ease);
    display: block;
    color: var(--text);
    box-shadow: var(--shadow-card);
}
.platform-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
    color: var(--text);
}
.platform-icon { font-size: 30px; margin-bottom: 8px; color: var(--text-2); }
.platform-name { font-weight: 600; font-size: 15px; }
.platform-format { font-size: 12.5px; color: var(--text-3); font-family: var(--font-mono); margin-top: 3px; }

.download-cta {
    margin-top: 30px;
    font-size: 14px;
    color: var(--text-2);
}
.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 5px 14px;
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-2);
}
.version-badge .ver { color: var(--accent); font-weight: 600; }

/* ---------- Callout ---------- */
.callout {
    margin-top: 36px;
    background: var(--accent-tint);
    border: 1px solid var(--accent-soft);
    border-radius: var(--radius-m);
    padding: 18px 22px;
    font-size: 14.5px;
    color: var(--text-2);
}
.callout strong { color: var(--text); }

/* ---------- Loop diagram (benchpilot) ---------- */
.loop-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 48px 0 8px;
}
.loop-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 10px 22px;
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-card);
    color: var(--text);
}
.loop-step.hot {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-tint);
}
.loop-arrow { color: var(--text-3); font-size: 18px; }

/* ---------- Stacked architecture (benchpilot) ---------- */
.arch-stack {
    margin-top: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.arch-row {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.arch-node {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-s);
    padding: 9px 20px;
    font-family: var(--font-mono);
    font-size: 13.5px;
    box-shadow: var(--shadow-card);
    color: var(--text);
}
.arch-node.core {
    border-color: var(--accent);
    background: var(--accent-tint);
    color: var(--accent);
    font-weight: 600;
}
.arch-node.hw { border-style: dashed; color: var(--text-2); }
.arch-connector { color: var(--text-3); font-size: 15px; line-height: 1; }

/* ---------- Mockup: generic app screen ---------- */
.app-window {
    background: var(--bg-elevated);
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-window);
    overflow: hidden;
    text-align: left;
    border: 1px solid var(--border);
}

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--border);
    padding: 40px 0 48px;
    margin-top: 40px;
}
.footer-content {
    max-width: var(--wrapper-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 600;
    font-size: 16px;
    color: var(--text);
}
.footer-links { display: flex; gap: 22px; }
.footer-links a { font-size: 13.5px; color: var(--text-2); }
.footer-links a:hover { color: var(--accent); }
.footer-note { font-size: 13px; color: var(--text-3); }

/* ---------- Scroll animation ----------
   Hidden-until-revealed only when JS is active (html.js-anim), so content
   stays visible without JavaScript and for crawlers. */
html.js-anim .animate-on-scroll {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
html.js-anim .animate-on-scroll.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .bento-grid { grid-template-columns: 1fr 1fr; }
    .platforms-grid { grid-template-columns: 1fr; }
    .split-view { grid-template-columns: 1fr; }
    section { padding: 56px 0; }
    .hero { padding: 72px 0 48px; }
}

@media (max-width: 600px) {
    .bento-grid { grid-template-columns: 1fr; }
    .bento-card.span-2 { grid-column: span 1; }
    .section-title { font-size: 32px; }
    .nav-menu { gap: 16px; }
    .nav-menu a.optional { display: none; }
}
