/* ThinkWell Labs — site styles. Hand-written, no build step, no external requests. */

:root {
  --ink: #0b0d10;
  --ink-2: #3a3f47;
  --ink-3: #6b717b;
  --paper: #ffffff;
  --paper-2: #f3f3f0;
  --rule: #e2e2dc;
  --night: #0b0d10;
  --night-2: #15181d;
  --cyan: #3cc4f0;
  --violet: #a58cff;
  --yellow: #ffd23f;
  --sans: "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --max: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }

.c-cyan { color: var(--cyan); }
.c-violet { color: var(--violet); }
.c-yellow { color: var(--yellow); }
.muted { color: var(--ink-3); font-weight: 500; }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 22px; font: 700 14px/1 var(--sans); letter-spacing: 0.02em; text-decoration: none; text-transform: uppercase; border: 2px solid transparent; transition: background .15s, color .15s, border-color .15s; }
.btn-yellow { background: var(--yellow); color: var(--ink); }
.btn-yellow:hover { background: #fff; }
.btn-ghost { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: var(--ink-2); }
.btn-line { border-color: var(--ink); color: var(--ink); }
.btn-line:hover { background: var(--ink); color: #fff; }
.btn-lg { min-height: 58px; padding: 0 28px; font-size: 18px; text-transform: none; letter-spacing: 0; }

/* ── Hero ── */
.hero { position: relative; background: radial-gradient(1200px 600px at 78% 30%, #16202c 0%, var(--night) 60%); color: #fff; padding: clamp(64px, 11vw, 140px) 0 0; overflow: hidden; }
#torus { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-inner { position: relative; }
.eyebrow { font: 500 12px/1.4 var(--mono); letter-spacing: 0.16em; text-transform: uppercase; color: #8d95a1; margin-bottom: 26px; }
.hero-title { font-size: clamp(40px, 7.4vw, 104px); line-height: 0.98; letter-spacing: -0.045em; max-width: 13ch; }
.hero-lede { margin-top: 28px; max-width: 36rem; font-size: clamp(17px, 1.6vw, 20px); color: #c4cad3; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
@media (max-width: 900px) {
  #torus { opacity: .55; }
}

/* ── Counters (glass cards over the hero) ── */
.counters { position: relative; display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; margin-top: clamp(56px, 8vw, 110px); padding-bottom: clamp(36px, 5vw, 56px); }
.counter { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; padding: 24px 24px 26px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14); border-top: 3px solid var(--yellow); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.counter:nth-child(2) { border-top-color: var(--cyan); }
.counter:nth-child(3) { border-top-color: var(--violet); }
.counter:nth-child(4) { border-top-color: #ff7a3d; }
.counter:nth-child(5) { border-top-color: #19b9a8; }
.counter:nth-child(6) { border-top-color: #ff5c8a; }
.counter:nth-child(7) { border-top-color: #fff; }
.counter .num { font-size: clamp(52px, 5.2vw, 80px); font-weight: 700; line-height: 1; letter-spacing: -0.05em; font-variant-numeric: tabular-nums; min-width: 1.1ch; }
.counter .lbl { font-size: 13.5px; line-height: 1.35; color: #b9c0ca; }
.counter .lbl b { display: block; color: #fff; font-size: 12px; font-family: var(--mono); letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 4px; font-weight: 600; }
@media (max-width: 1280px) { .counter { padding: 20px 18px 22px; } }
@media (max-width: 1100px) { .counters { grid-template-columns: repeat(4, 1fr); } .counter:last-child { grid-column: span 2; } }
@media (max-width: 560px) { .counters { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) { .counter { padding: 16px; gap: 8px; } .counter .lbl { font-size: 12.5px; } }

/* ── Sections with a SEAM-style rail ── */
.section { position: relative; padding: clamp(72px, 10vw, 128px) 0; }
.section-alt { background: var(--paper-2); }
#work { background: #ebe8f2; } /* light gray lavender so the white cards read as cards */
#work .rail { border-right-color: #d8d3e3; }
.section-black { background: var(--night); color: #fff; }
.section-yellow { background: var(--yellow); color: var(--ink); }
.rail { position: absolute; left: 0; top: 0; bottom: 0; width: 44px; border-right: 1px solid var(--rule); display: flex; justify-content: center; padding-top: clamp(72px, 10vw, 128px); }
.section-black .rail { border-right-color: #23272e; }
.section-alt .rail { border-right-color: #dcdcd5; }
.rail span { writing-mode: vertical-rl; transform: rotate(180deg); font: 500 11px/1 var(--mono); letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-3); white-space: nowrap; }
@media (max-width: 1380px) { .rail { display: none; } }

.sec-head { margin-bottom: clamp(36px, 5vw, 60px); max-width: 60rem; }
.kicker { font: 600 12px/1 var(--mono); letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.kicker::before { content: ""; width: 26px; height: 3px; background: var(--yellow); }
.section-yellow .kicker::before { background: var(--ink); }
.kicker-yellow { color: var(--yellow); }
.sec-head h2, .briar h2, .contact h2 { font-size: clamp(30px, 4.4vw, 56px); line-height: 1.04; letter-spacing: -0.035em; }

.grid { display: grid; gap: clamp(16px, 2vw, 26px); }

/* ── Product cards ── */
.cards { grid-template-columns: repeat(3, 1fr); grid-auto-flow: dense; }
.sub-head { margin: clamp(48px, 6vw, 72px) 0 22px; font: 600 12px/1 var(--mono); letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3); display: flex; align-items: center; gap: 14px; }
.sub-head::after { content: ""; flex: 1; height: 1px; background: var(--rule); }
div.card:hover { transform: none; box-shadow: none; }
@media (max-width: 1000px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }
.card { display: flex; flex-direction: column; text-decoration: none; background: #fff; border: 1px solid var(--rule); transition: transform .2s, box-shadow .2s, border-color .2s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -22px rgba(11,13,16,.45); border-color: #cfcfc6; }
.card .media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--night); border-bottom: 4px solid var(--tone, var(--yellow)); }
.card .media img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .5s; }
.card:hover .media img { transform: scale(1.04); }
.card .media-art svg { width: 100%; height: 100%; }
.card .body { padding: 22px 22px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card .tag { font: 600 11.5px/1.3 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge { background: var(--ink); color: var(--yellow); padding: 3px 7px; letter-spacing: 0.1em; }
.card h3 { font-size: 26px; letter-spacing: -0.03em; }
.card p { color: var(--ink-2); font-size: 15.5px; }
.card .url { margin-top: auto; padding-top: 8px; font: 600 13px/1 var(--mono); color: var(--ink); }
.card:hover .url { text-decoration: underline; text-underline-offset: 4px; }
.card-feature { grid-column: span 2; display: grid; grid-template-columns: 1.25fr 1fr; }
.card-feature .media { aspect-ratio: auto; min-height: 320px; border-bottom: 0; border-right: 4px solid var(--tone); }
.card-feature .body { padding: clamp(24px, 3vw, 40px); justify-content: center; }
.card-feature h3 { font-size: clamp(32px, 3.6vw, 48px); }
.card-feature p { font-size: 17px; }
@media (max-width: 640px) {
  .card-feature { grid-column: auto; grid-template-columns: 1fr; }
  .card-feature .media { min-height: 0; aspect-ratio: 16 / 10; border-right: 0; border-bottom: 4px solid var(--tone); }
}
.card-dev .media { filter: grayscale(.4); }

/* ── Papers list ── */
.papers { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--ink); }
.papers li { border-bottom: 1px solid #d6d6ce; }
.papers a, .papers .p-soon { display: grid; grid-template-columns: 170px 1fr auto; grid-template-areas: "tag title meta" "tag desc meta"; column-gap: 28px; row-gap: 6px; padding: 24px 4px; text-decoration: none; transition: background .15s, padding .15s; }
.papers a:hover { background: #fff; padding-left: 14px; }
.is-forthcoming .p-title, .is-forthcoming .p-desc { color: var(--ink-3); }
.p-tag { grid-area: tag; font: 600 11.5px/1.6 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.p-title { grid-area: title; font-size: clamp(19px, 2vw, 24px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
.p-desc { grid-area: desc; color: var(--ink-2); font-size: 15.5px; max-width: 46rem; }
.p-meta { grid-area: meta; font: 500 12.5px/1.6 var(--mono); color: var(--ink-3); white-space: nowrap; text-align: right; }
@media (max-width: 820px) {
  .papers a, .papers .p-soon { grid-template-columns: minmax(0, 1fr); grid-template-areas: "tag" "title" "desc" "meta"; }
  .p-meta { text-align: left; white-space: normal; }
}
.papers-foot { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.papers-foot p { color: var(--ink-2); font-size: 15px; }
.papers-foot .links { display: flex; flex-wrap: wrap; gap: 10px; }

/* ── Briar ── */
.briar { display: grid; grid-template-columns: minmax(260px, 420px) 1fr; gap: clamp(32px, 6vw, 88px); align-items: start; }
@media (max-width: 860px) { .briar { grid-template-columns: 1fr; } .portrait { max-width: 360px; } }
.portrait-frame { position: relative; aspect-ratio: 4 / 5; background: linear-gradient(150deg, #1b2330 0%, #0e1116 55%, #221b33 100%); border-bottom: 6px solid var(--yellow); overflow: hidden; }
.portrait-frame::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 30% 20%, rgba(60,196,240,.22), transparent 55%), radial-gradient(circle at 80% 85%, rgba(165,140,255,.25), transparent 55%); pointer-events: none; }
.portrait-frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 1; }
.monogram { position: absolute; inset: 0; display: grid; place-items: center; font-size: clamp(110px, 14vw, 190px); font-weight: 700; letter-spacing: -0.08em; color: transparent; -webkit-text-stroke: 1.5px rgba(255,255,255,.55); }
.portrait-cap { margin-top: 16px; font-weight: 700; font-size: 18px; }
.portrait-cap span { font: 500 12.5px/1.6 var(--mono); color: #8d95a1; letter-spacing: 0.04em; }
.briar-text { display: flex; flex-direction: column; gap: 22px; }
.briar-text .kicker { margin-bottom: 0; }
.briar-text .big { font-size: clamp(19px, 2vw, 24px); line-height: 1.4; color: #fff; }
.briar-text p { color: #b9c0ca; }
blockquote { margin: 6px 0; padding-left: 20px; border-left: 4px solid var(--yellow); font-size: clamp(22px, 2.4vw, 30px); font-weight: 700; letter-spacing: -0.02em; color: #fff; }
.facts { margin: 8px 0 0; border-top: 1px solid #2a2f37; }
.facts div { display: grid; grid-template-columns: 140px 1fr; gap: 16px; padding: 13px 0; border-bottom: 1px solid #2a2f37; }
.facts dt { font: 600 11.5px/1.7 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: #8d95a1; }
.facts dd { margin: 0; color: #e7eaee; font-size: 15.5px; }
.facts a { color: var(--yellow); }
@media (max-width: 460px) { .facts div { grid-template-columns: 1fr; gap: 2px; } }

/* ── Principles ── */
.sec-note { margin-top: 18px; max-width: 46rem; color: var(--ink-2); font-size: 16px; }
.principles-foot { margin-top: 28px; font-size: 14.5px; color: var(--ink-3); }
.outcomes { list-style: none; margin: 0 0 clamp(36px, 5vw, 56px); padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 2px solid var(--ink); }
.outcomes li { padding: 22px 4px; border-bottom: 1px solid var(--rule); font-size: clamp(22px, 2.6vw, 34px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.15; }
.outcomes li:nth-child(odd) { padding-right: 28px; }
.outcomes li span { color: var(--ink-3); font-weight: 500; }
@media (max-width: 760px) { .outcomes { grid-template-columns: 1fr; } }
.principles { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .principles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .principles { grid-template-columns: 1fr; } }
.principle a { color: var(--ink); }
.status { display: inline-block; margin-right: 8px; padding: 2px 6px; border: 1px solid var(--ink); color: var(--ink); font-size: 10.5px; letter-spacing: 0.12em; }
.principle { padding: 30px 28px 32px; border-top: 6px solid var(--tone); background: var(--paper-2); }
.p-num { display: inline-block; font: 700 13px/1 var(--mono); background: var(--ink); color: #fff; padding: 6px 9px; margin-bottom: 20px; }
.principle h3 { font-size: 26px; margin-bottom: 10px; letter-spacing: -0.03em; }
.principle p { color: var(--ink-2); font-size: 15.5px; }

/* ── Contact ── */
.contact { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: end; }
.contact > * { min-width: 0; }
@media (max-width: 860px) { .contact { grid-template-columns: minmax(0, 1fr); } }
.contact h2 { margin-bottom: 18px; }
.contact p { font-size: 17px; max-width: 34rem; margin-bottom: 28px; }
.contact .btn-dark:hover { background: #fff; color: var(--ink); }
.subscribe { background: var(--ink); color: #fff; padding: 26px; }
.subscribe label { display: block; font-size: 15px; color: #c4cad3; margin-bottom: 14px; }
.subscribe label b { color: #fff; }
.sub-row { display: flex; gap: 8px; }
.sub-row input { flex: 1; min-width: 0; height: 48px; padding: 0 14px; background: #fff; border: 0; font: 16px var(--sans); color: var(--ink); }
.sub-row button { height: 48px; padding: 0 18px; background: var(--yellow); border: 0; font: 700 14px var(--sans); text-transform: uppercase; letter-spacing: 0.04em; cursor: pointer; color: var(--ink); }
.sub-row button:hover { background: #fff; }