/* Tiepoint design system: tokens + page styles.
   Rules: bright, gridded, minimal. Gray = not connected. Pastel = connected system.
   Indigo = Tiepoint. Green = live / confirmed. Coral only for a broken link. */
:root{
  --bg:#FAFBFC; --surface:#FFFFFF; --sunken:#F4F6F9;
  --ink:#0F1728; --text:#2C3647; --slate:#5A6878; --muted:#8A95A3;
  --line:#E6E9EE; --line-strong:#D5DBE3; --grid:#E3E8EF;
  --indigo:#5B78F0; --indigo-ink:#3F5BD6; --indigo-soft:#EEF1FE; --indigo-line:#C9D3FA;
  --green:#3CB97C; --green-ink:#2E9A66; --green-soft:#DFF5E9;
  --coral:#E59A9A;
  --lav:#E3DCF8; --sky:#D6E7F7; --peach:#F8E0D0; --butter:#F5EACA;
  --sans:"Inter",system-ui,-apple-system,sans-serif;
  --display:"Inter Tight","Inter",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --r-sm:8px; --r-md:12px; --r-lg:18px; --r-xl:24px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 12px 32px rgba(16,24,40,.06);
  --max:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,canvas{display:block;max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 max(16px,4vw)}
@media (min-width:1240px){.container{padding:0 40px}}

/* blueprint backdrop: an isometric dot lattice */
.blueprint{background-image:
  radial-gradient(circle at 0 0,var(--grid) 1px,transparent 1.4px),
  radial-gradient(circle at 0 0,var(--grid) 1px,transparent 1.4px);
  background-size:28px 16.17px;background-position:0 0,14px 8.08px}

/* type */
.eyebrow{font:500 12px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--indigo)}
.eyebrow.muted{color:var(--muted)}
h1,h2,h3{font-family:var(--display);color:var(--ink);margin:0;letter-spacing:-.03em;text-wrap:balance}
h1{font-size:clamp(40px,6vw,72px);line-height:1;font-weight:600}
h2{font-size:clamp(30px,4vw,46px);line-height:1.05;font-weight:600}
h3{font-size:20px;line-height:1.25;font-weight:600;letter-spacing:-.015em}
.lede{font-size:clamp(17px,1.6vw,19.5px);color:var(--slate);max-width:60ch;margin:0}
.mono{font-family:var(--mono)}

/* buttons + chips */
.btn{display:inline-flex;align-items:center;gap:10px;height:46px;padding:0 20px;border-radius:999px;font:500 15px var(--sans);border:1px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--ink);color:#fff;box-shadow:0 6px 20px rgba(15,23,40,.18)}
.btn.indigo{background:var(--indigo);color:#fff;box-shadow:0 6px 20px rgba(91,120,240,.28)}
.btn.ghost{background:var(--surface);color:var(--ink);border-color:var(--line-strong)}
.btn .play{width:22px;height:22px;border-radius:50%;background:var(--indigo-soft);color:var(--indigo);display:grid;place-items:center;font-size:9px}
.btn:focus-visible,.tab:focus-visible,.stepper button:focus-visible{outline:2px solid var(--indigo);outline-offset:3px}
.chip{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:999px;font:500 12px var(--mono);color:var(--slate);background:var(--surface);border:1px solid var(--line)}
.chip.ind{color:var(--indigo-ink);background:var(--indigo-soft);border-color:var(--indigo-line)}
.chip.ok{color:var(--green-ink);background:var(--green-soft);border-color:#BFE8D2}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor;display:inline-block}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(250,251,252,.82);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.scrolled{border-bottom-color:var(--line)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font:600 19px var(--display);letter-spacing:-.02em;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:30px;font-size:14.5px;color:var(--slate)}
.nav-links a:hover{color:var(--ink)}
.nav-links .btn{height:38px;font-size:14px;padding:0 16px}
@media (max-width:820px){.nav-links a:not(.btn){display:none}}

/* hero */
.hero{padding:40px 0 0}
.hero-grid{display:grid;grid-template-columns:minmax(0,.78fr) minmax(0,1.22fr);gap:12px;align-items:center;min-height:min(680px,calc(100vh - 140px))}
.hero .eyebrow{margin-bottom:24px;display:inline-flex;gap:10px;align-items:center}
.hero h1{max-width:11ch;margin:0 0 22px;font-size:clamp(42px,5.4vw,70px)}
.hero h1 em{font-style:normal;color:var(--indigo)}
.hero .lede{margin:0 0 32px;max-width:48ch}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap}
.stage{position:relative;margin-right:-3vw}
@media (max-width:900px){.stage{margin-right:0}}
.stage canvas{width:100%;aspect-ratio:760/540}
.stepper{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:560px;margin:0 auto;text-align:left}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;min-height:0;gap:8px}.hero{padding-top:40px}}
.stepper button{all:unset;cursor:pointer;display:grid;gap:9px;font-size:14px;color:var(--slate)}
.stepper .bar{height:2px;background:var(--line);border-radius:2px;overflow:hidden}
.stepper .bar i{display:block;height:100%;width:0;background:var(--indigo)}
.stepper button.done .bar i{background:#A9B8F5}
.stepper b{font:500 11px var(--mono);letter-spacing:.08em;color:#A0A9B6;margin-right:6px}
.stepper button.on{color:var(--ink)}
.stepper button.on b{color:var(--indigo)}
.stepper button.on.last b{color:var(--green-ink)}
.stepper button.on.last .bar i{background:#4CC38A}

/* format ticker */
.ticker{margin-top:40px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface);overflow:hidden;position:relative}
.ticker::before,.ticker::after{content:"";position:absolute;top:0;bottom:0;width:80px;z-index:1}
.ticker::before{left:0;background:linear-gradient(90deg,var(--surface),transparent)}
.ticker::after{right:0;background:linear-gradient(-90deg,var(--surface),transparent)}
.ticker-track{display:flex;gap:10px;padding:16px 0;width:max-content;animation:tick 48s linear infinite}
.ticker-label{font:600 11.5px var(--mono);color:#fff;background:var(--ink);letter-spacing:.1em;text-transform:uppercase;display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;border-radius:999px;margin-left:22px;white-space:nowrap}
.ticker-label::after{content:"\2192";color:#A9B8F5;font-weight:500}
.ticker-track>.ticker-label:first-child{margin-left:0}
@keyframes tick{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.ticker-track{animation:none}}

/* sections */
section.block{padding:96px 0}
@media (max-width:700px){section.block{padding:64px 0}}
.section-head{display:grid;gap:18px;max-width:760px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center .lede{margin:0 auto}

/* problem cards */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:900px){.cards3{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:0 1px 2px rgba(16,24,40,.03)}
.card .art{background:var(--sunken);border-bottom:1px solid var(--line)}
.card .art canvas{width:100%;aspect-ratio:360/230}
.card .body{padding:22px 24px 26px;display:grid;gap:8px}
.card p{margin:0;color:var(--slate);font-size:15px}
.card .k{font:500 11.5px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

/* use-case picker */
.picker{display:grid;grid-template-columns:300px 1fr;gap:28px;align-items:start}
@media (max-width:980px){.picker{grid-template-columns:1fr}}
.tabs{display:grid;gap:6px;position:sticky;top:92px}
@media (max-width:980px){.tabs{position:static;display:flex;overflow-x:auto;gap:8px;padding-bottom:6px;scrollbar-width:none;mask-image:linear-gradient(90deg,#000 85%,transparent)}.tab{min-width:180px}}
.tab{all:unset;cursor:pointer;display:grid;gap:4px;padding:16px 18px;border-radius:var(--r-md);border:1px solid transparent;transition:background .15s,border-color .15s;min-width:200px}
.tab:hover{background:var(--surface)}
.tab .t{font:600 16px var(--display);color:var(--ink);letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.tab .s{font-size:13.5px;color:var(--slate)}
.tab .n{font:500 11px var(--mono);color:var(--muted)}
.tab[aria-selected="true"]{background:var(--surface);border-color:var(--line);box-shadow:var(--shadow)}
.tab[aria-selected="true"] .n{color:var(--indigo)}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--shadow);overflow:hidden}
.panel .scene{background:var(--sunken);border-top:1px solid var(--line);position:relative}
.panel .scene canvas{width:100%;aspect-ratio:760/420}
.panel .scene .replay{position:absolute;right:14px;top:14px;font:500 12px var(--mono);color:var(--slate);background:var(--surface);border:1px solid var(--line);border-radius:999px;height:28px;padding:0 12px;cursor:pointer}
.panel .info{padding:28px 32px 32px;display:grid;grid-template-columns:1.2fr 1fr;gap:32px}
@media (max-width:720px){.panel .info{grid-template-columns:1fr;padding:24px}}
.panel .info p{margin:10px 0 0;color:var(--slate)}
.flow{display:grid;gap:12px;align-content:start}
.flow .row{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.flow .lbl{font:500 11px var(--mono);letter-spacing:.1em;color:var(--muted);text-transform:uppercase;width:44px}
.ticks{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:8px}
.ticks li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text)}
.ticks li::before{content:"";flex:none;width:16px;height:16px;margin-top:4px;border-radius:50%;background:var(--green-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.2l2.2 2.2 4.8-4.8' fill='none' stroke='%232E9A66' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
@media (max-width:900px){.steps{grid-template-columns:1fr}}
.step-card .num{font:500 12px var(--mono);color:var(--indigo)}

/* principles */
.principles{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);overflow:hidden}
.principles>div{padding:28px 26px;border-right:1px solid var(--line);display:grid;gap:8px;align-content:start}
.principles>div:last-child{border-right:0}
.principles p{margin:0;font-size:15px;color:var(--slate)}
.principles .ic{width:34px;height:34px;border-radius:10px;background:var(--indigo-soft);display:grid;place-items:center;color:var(--indigo);margin-bottom:6px}
@media (max-width:980px){.principles{grid-template-columns:1fr 1fr}.principles>div:nth-child(2){border-right:0}.principles>div:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media (max-width:560px){.principles{grid-template-columns:1fr}.principles>div{border-right:0;border-bottom:1px solid var(--line)}}

/* video */
.video-frame{aspect-ratio:16/9;border-radius:var(--r-xl);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);position:relative;overflow:hidden;display:grid;place-items:center}
.video-frame canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.9}
.video-frame .playbtn{position:relative;width:84px;height:84px;border-radius:50%;background:var(--indigo);color:#fff;display:grid;place-items:center;font-size:24px;box-shadow:0 14px 40px rgba(91,120,240,.4);border:0;cursor:pointer}
.video-frame .cap{position:absolute;left:22px;bottom:18px;font:500 12px var(--mono);color:var(--slate);letter-spacing:.08em;background:rgba(255,255,255,.85);padding:6px 10px;border-radius:8px}

/* CTA + footer */
.cta{border-radius:var(--r-xl);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);display:grid;grid-template-columns:1.1fr 1fr;overflow:hidden}
.cta .copy{padding:56px 52px;display:grid;gap:18px;align-content:center}
.cta .art{background:var(--sunken);border-left:1px solid var(--line)}
.cta .art canvas{width:100%;height:100%;min-height:320px}
@media (max-width:900px){.cta{grid-template-columns:1fr}.cta .art{border-left:0;border-top:1px solid var(--line)}.cta .copy{padding:36px 28px}}
footer{padding:56px 0 64px;color:var(--muted);font-size:14px}
footer .container{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
footer .links{display:flex;gap:10px 24px;flex-wrap:wrap}
footer .links a{white-space:nowrap}

/* AI services */
.cards4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:1100px){.cards4{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.cards4{grid-template-columns:1fr}}
.cards4 .card .art canvas{aspect-ratio:300/200}
.phases{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:28px}
.phases .arrow{width:28px;height:1px;background:var(--indigo-line)}
.phases-note{color:var(--slate);font-size:14.5px;margin-left:8px}

/* mobile: illustration right under the headline, tidy stepper, equal buttons */
@media (max-width:900px){
  .hero-copy{display:contents}
  .hero-grid{display:flex;flex-direction:column;align-items:stretch}
  .hero-copy .eyebrow{order:1;margin-bottom:14px}
  .hero-copy h1{order:2;margin-bottom:8px}
  .stage{order:3;margin:0 -8px}
  .hero-copy .lede{order:4;margin:18px 0 22px}
  .hero-copy .ctas{order:5}
}
@media (max-width:560px){
  .stepper{gap:10px}
  .stepper button{font-size:12.5px;white-space:nowrap}
  .stepper b{display:none}
  .hero .ctas .btn,.cta .ctas .btn{flex:1 1 100%;justify-content:center}
  .nav-links .btn{height:44px}
  .phases .arrow{display:none}
  .phases-note{margin-left:0;flex-basis:100%}
}