/* Coglix Labs marketing site. One stylesheet, Apple-style: quiet greys, one blue accent, dark navy hero. */

:root {
    --black: #000000;
    --navy-950: #040a18;
    --navy-900: #0a1630;
    --navy-800: #0f2550;
    --blue-700: #0047c7;
    --blue-600: #0a5cf0;
    --blue-500: #2f7bff;
    --blue-300: #8ab8ff;
    --blue-50: #eef4ff;
    --grey-900: #1d1d1f;
    --grey-700: #424245;
    --grey-500: #6e6e73;
    --grey-300: #d2d2d7;
    --grey-200: #e8e8ed;
    --grey-100: #f5f5f7;
    --white: #ffffff;

    --text: var(--grey-900);
    --text-2: var(--grey-500);
    --surface: var(--white);
    --surface-2: var(--grey-100);
    --line: var(--grey-200);
    --accent: var(--blue-600);
    --accent-hover: var(--blue-700);

    --font: "Geist", -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
    --radius-s: 10px;
    --radius-m: 16px;
    --radius-l: 24px;
    --max: 1120px;
    --ease: cubic-bezier(.2, .8, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
    margin: 0;
    font-family: var(--font);
    font-size: 17px;
    line-height: 1.55;
    color: var(--text);
    background: var(--surface);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.022em; text-wrap: balance; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--blue-500); outline-offset: 2px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -48px; z-index: 100; background: var(--white); color: var(--text); padding: 8px 14px; border-radius: var(--radius-s); }
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.section { padding: 112px 0; }
.section.tint { background: var(--surface-2); }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head h2 { font-size: clamp(32px, 5vw, 48px); line-height: 1.08; }
.section-head p { margin-top: 16px; font-size: 19px; color: var(--text-2); }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 44px; padding: 0 22px; border-radius: 999px; border: 1px solid transparent;
    font: 500 16px/1 var(--font); cursor: pointer; text-decoration: none;
    transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .1s var(--ease);
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { color: var(--accent); border-color: currentColor; background: transparent; }
.btn-ghost:hover { background: var(--blue-50); }
.btn-light { background: var(--white); color: var(--navy-900); }
.btn-light:hover { background: var(--grey-200); }
.btn-outline-light { color: var(--white); border-color: rgba(255, 255, 255, .35); }
.btn-outline-light:hover { border-color: var(--white); }
.btn-sm { min-height: 34px; padding: 0 16px; font-size: 14px; }
.btn[disabled] { opacity: .55; cursor: progress; }

/* Navigation */
.nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255, 255, 255, .78);
    backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, .08);
}
.nav.on-dark { background: rgba(4, 10, 24, .72); border-bottom-color: rgba(255, 255, 255, .08); }
.nav-inner { display: flex; align-items: center; gap: 32px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: inherit; font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { display: flex; gap: 28px; margin: 0; padding: 0; list-style: none; }
.nav-links a { color: inherit; opacity: .8; font-size: 14px; }
.nav-links a:hover { opacity: 1; text-decoration: none; }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-actions .text-link { color: inherit; font-size: 14px; opacity: .8; padding: 8px 4px; }
.nav-actions .text-link:hover { opacity: 1; text-decoration: none; }
.nav.on-dark { color: var(--white); }

/* Hero */
.hero {
    position: relative; overflow: hidden; color: var(--white);
    background:
        radial-gradient(60% 50% at 50% 0%, rgba(47, 123, 255, .35), transparent 70%),
        radial-gradient(40% 40% at 85% 60%, rgba(10, 92, 240, .22), transparent 70%),
        linear-gradient(180deg, var(--black) 0%, var(--navy-950) 40%, var(--navy-900) 100%);
    padding: 120px 0 0;
    text-align: center;
}
.hero h1 { font-size: clamp(44px, 8vw, 88px); line-height: 1.02; letter-spacing: -0.035em; font-weight: 600; }
.hero .lede { margin: 24px auto 0; max-width: 620px; font-size: clamp(18px, 2.2vw, 22px); color: rgba(255, 255, 255, .72); }
.hero-ctas { margin-top: 36px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 14px; color: rgba(255, 255, 255, .5); }

/* Product mock: a stylised session window, drawn in HTML/SVG so it stays crisp */
.mock {
    position: relative; margin: 72px auto 0; max-width: 980px;
    border-radius: var(--radius-l) var(--radius-l) 0 0;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .12); border-bottom: 0;
    padding: 12px 12px 0;
    box-shadow: 0 -20px 80px rgba(47, 123, 255, .18);
}
.mock-bar { display: flex; align-items: center; gap: 8px; padding: 4px 6px 12px; }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .2); }
.mock-bar span { margin-left: 12px; font-size: 12px; color: rgba(255, 255, 255, .5); }
.mock-body { display: grid; grid-template-columns: 1fr 280px; gap: 12px; text-align: left; }
.mock-cam {
    position: relative; aspect-ratio: 16 / 10; border-radius: var(--radius-m) var(--radius-m) 0 0; overflow: hidden;
    background: radial-gradient(80% 80% at 50% 30%, #13284f, #070f22);
}
.mock-cam svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.mock-chip {
    position: absolute; left: 16px; bottom: 16px; display: flex; align-items: center; gap: 8px;
    padding: 8px 14px; border-radius: 999px; font-size: 13px; color: var(--white);
    background: rgba(255, 255, 255, .12); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.mock-chip b { width: 8px; height: 8px; border-radius: 50%; background: #3ddc84; }
.mock-side { display: grid; gap: 12px; align-content: start; }
.mock-card { border-radius: var(--radius-m); background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .08); padding: 16px; }
.mock-card small { display: block; font-size: 12px; color: rgba(255, 255, 255, .5); }
.mock-card strong { display: block; margin-top: 4px; font-size: 32px; font-weight: 600; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.mock-card .bar { height: 4px; margin-top: 12px; border-radius: 2px; background: rgba(255, 255, 255, .1); overflow: hidden; }
.mock-card .bar i { display: block; height: 100%; width: 66%; background: var(--blue-500); border-radius: 2px; }
.mock-list { list-style: none; margin: 8px 0 0; padding: 0; font-size: 13px; color: rgba(255, 255, 255, .72); }
.mock-list li { display: flex; justify-content: space-between; padding: 6px 0; border-top: 1px solid rgba(255, 255, 255, .06); }
.mock-list li:first-child { border-top: 0; color: var(--white); }
.mock-list span:last-child { color: rgba(255, 255, 255, .45); font-variant-numeric: tabular-nums; }

/* Logos */
.logos { padding: 48px 0; border-bottom: 1px solid var(--line); }
.logos p { text-align: center; font-size: 14px; color: var(--text-2); }
.logos ul { margin: 24px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 24px 56px; }
.logos img { height: 36px; width: auto; object-fit: contain; filter: grayscale(1); opacity: .6; transition: opacity .2s var(--ease), filter .2s var(--ease); }
.logos a:hover img { filter: none; opacity: 1; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.stat { padding: 8px 0; border-top: 1px solid var(--line); padding-top: 24px; }
.stat strong { display: block; font-size: 56px; font-weight: 600; letter-spacing: -0.03em; line-height: 1; color: var(--navy-800); font-variant-numeric: tabular-nums; }
.stat p { margin-top: 12px; color: var(--text-2); max-width: 30ch; }

/* Feature cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--surface); border-radius: var(--radius-l); padding: 32px; }
.section:not(.tint) .card { background: var(--surface-2); }
.card .icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--blue-50); color: var(--accent); }
.card .icon svg { width: 24px; height: 24px; }
.card h3 { margin-top: 24px; font-size: 22px; }
.card p { margin-top: 10px; color: var(--text-2); }
.chips { margin: 20px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { font-size: 13px; padding: 6px 12px; border-radius: 999px; background: var(--white); border: 1px solid var(--line); color: var(--grey-700); }

/* How it works */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split h2 { font-size: clamp(32px, 4.5vw, 48px); line-height: 1.08; }
.split .lede { margin-top: 16px; font-size: 19px; color: var(--text-2); }
.steps { margin: 40px 0 0; padding: 0; list-style: none; display: grid; gap: 24px; counter-reset: step; }
.steps li { display: grid; grid-template-columns: 32px 1fr; gap: 16px; counter-increment: step; }
.steps li::before {
    content: counter(step); width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
    background: var(--navy-900); color: var(--white); font-size: 14px; font-weight: 600;
}
.steps strong { display: block; font-weight: 600; }
.steps span { color: var(--text-2); }
.panel {
    border-radius: var(--radius-l); padding: 40px; color: var(--white);
    background: linear-gradient(160deg, var(--navy-800), var(--navy-950));
}
.panel dl { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 32px 24px; }
.panel dt { font-size: 13px; color: rgba(255, 255, 255, .55); }
.panel dd { margin: 6px 0 0; font-size: 28px; font-weight: 600; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.panel p { margin-top: 32px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .12); color: rgba(255, 255, 255, .72); font-size: 15px; }

/* Testimonials */
.quotes { columns: 3 300px; column-gap: 20px; }
.quote { break-inside: avoid; margin: 0 0 20px; padding: 28px; border-radius: var(--radius-l); background: var(--surface); }
.quote blockquote { margin: 0; font-size: 17px; line-height: 1.5; }
.quote figcaption { margin-top: 20px; display: flex; align-items: center; gap: 12px; font-size: 14px; }
.quote figcaption img { width: 36px; height: 36px; object-fit: contain; border-radius: 8px; background: var(--white); }
.quote figcaption .initial { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: var(--blue-50); color: var(--accent); font-weight: 600; }
.quote figcaption span { display: block; color: var(--text-2); }

/* Trust band */
.trust { background: var(--navy-950); color: var(--white); text-align: center; padding: 96px 0; }
.trust h2 { font-size: clamp(28px, 4vw, 40px); }
.trust ul { margin: 32px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.trust li { padding: 10px 18px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .16); font-size: 14px; color: rgba(255, 255, 255, .85); }
.trust p { margin-top: 28px; color: rgba(255, 255, 255, .6); }
.trust a { color: var(--blue-300); }

/* Plans */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 420px)); gap: 20px; justify-content: center; }
.plan { display: flex; flex-direction: column; padding: 36px; border-radius: var(--radius-l); background: var(--surface-2); }
.plan.featured { background: var(--navy-900); color: var(--white); }
.plan h3 { font-size: 24px; }
.plan > p { margin-top: 6px; color: var(--text-2); }
.plan.featured > p { color: rgba(255, 255, 255, .6); }
.plan ul { margin: 28px 0 32px; padding: 0; list-style: none; display: grid; gap: 12px; flex: 1; }
.plan li { display: grid; grid-template-columns: 20px 1fr; gap: 10px; font-size: 15px; }
.plan li svg { width: 20px; height: 20px; color: var(--accent); }
.plan.featured li svg { color: var(--blue-300); }

/* FAQ */
.faq { max-width: 800px; margin: 0 auto; }
.faq h3 { margin: 48px 0 8px; font-size: 14px; font-weight: 600; color: var(--text-2); letter-spacing: 0; }
.faq h3:first-child { margin-top: 0; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
    list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative;
    font-size: 18px; font-weight: 500;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: ""; position: absolute; right: 6px; top: 50%; width: 10px; height: 10px; margin-top: -7px;
    border-right: 2px solid var(--grey-500); border-bottom: 2px solid var(--grey-500); transform: rotate(45deg);
    transition: transform .25s var(--ease);
}
.faq details[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq details p { padding: 0 0 24px; color: var(--grey-700); max-width: 68ch; }

/* Closing CTA */
.cta { text-align: center; }
.cta h2 { font-size: clamp(36px, 6vw, 64px); line-height: 1.04; letter-spacing: -0.03em; }
.cta p { margin: 16px auto 0; max-width: 560px; font-size: 19px; color: var(--text-2); }
.cta .hero-ctas { margin-top: 32px; }
.community { margin-top: 28px; display: flex; gap: 20px; justify-content: center; font-size: 15px; }

/* Footer */
.footer { background: var(--surface-2); padding: 64px 0 40px; font-size: 13px; color: var(--text-2); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer h4 { margin: 0 0 12px; font-size: 13px; font-weight: 600; color: var(--text); }
.footer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.footer a { color: var(--text-2); }
.footer a:hover { color: var(--text); }
.footer .about { max-width: 34ch; margin-top: 12px; }
.footer-base { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--grey-300); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-base nav { display: flex; gap: 20px; }

/* Demo dialog */
dialog.demo {
    width: min(480px, calc(100% - 32px)); padding: 0; border: 0; border-radius: var(--radius-l);
    box-shadow: 0 24px 80px rgba(0, 0, 0, .3); color: var(--text);
}
dialog.demo::backdrop { background: rgba(4, 10, 24, .5); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
dialog.demo form { padding: 32px; display: grid; gap: 16px; }
dialog.demo h2 { font-size: 24px; }
dialog.demo .sub { color: var(--text-2); font-size: 15px; margin-top: -8px; }
dialog.demo label { display: grid; gap: 6px; font-size: 14px; font-weight: 500; }
dialog.demo input, dialog.demo textarea {
    font: 400 16px/1.4 var(--font); padding: 12px 14px; border-radius: var(--radius-s);
    border: 1px solid var(--grey-300); background: var(--white); color: var(--text); resize: vertical;
}
dialog.demo input:focus, dialog.demo textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(10, 92, 240, .15); }
dialog.demo .row { display: flex; gap: 12px; justify-content: flex-end; margin-top: 8px; }
dialog.demo .status { font-size: 14px; min-height: 20px; }
dialog.demo .status.ok { color: #1a7f37; }
dialog.demo .status.err { color: #c62828; }
.close-x { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: 0; border-radius: 50%; background: var(--surface-2); cursor: pointer; font-size: 18px; color: var(--grey-700); }

/* Reveal: one quiet fade, only where JS is on and motion is allowed */
@media (prefers-reduced-motion: no-preference) {
    .js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
    .js .reveal.in { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
    .nav-links { display: none; }
    .mock-body { grid-template-columns: 1fr; }
    .mock-side { display: none; }
    .grid-3, .stats { grid-template-columns: 1fr; }
    .split { grid-template-columns: 1fr; gap: 40px; }
    .plans { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .section { padding: 80px 0; }
}
@media (max-width: 520px) {
    .wrap { padding: 0 16px; }
    .nav-actions .text-link.lang { display: none; }
    .hero { padding-top: 80px; }
    .card, .plan, .panel { padding: 24px; }
    .panel dl { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}