/* Fangviper size chart. Matches fangviper.com: pure black, white type, Bebas Neue + Montserrat, lots of space. */
:root {
  --bg: #000;
  --fg: #fff;
  --mute: #9a9a9a;
  --dim: #5e5e5e;
  --hair: rgba(255, 255, 255, .14);
  --display: "Bebas Neue", Impact, "Arial Narrow", sans-serif;
  --body: Montserrat, system-ui, -apple-system, "Segoe UI", sans-serif;
  --gutter: clamp(16px, 3vw, 40px);
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { background: var(--bg); color: var(--fg); font: 400 14px/1.6 var(--body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { display: block; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
::selection { background: #fff; color: #000; }
:focus-visible { outline: 1px solid #fff; outline-offset: 4px; }
h1, h2, h3 { font-family: var(--display); font-weight: 400; letter-spacing: .01em; line-height: 1; }

/* header (same layout as the store) */
.header {
  position: sticky; top: 0; z-index: 10; height: 66px; background: #000;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 var(--gutter);
}
.header__logo img { width: 26px; height: auto; }
.header__nav { display: flex; gap: 28px; }
.header__nav a { font: 400 18px/1 var(--display); letter-spacing: .02em; color: rgba(255, 255, 255, .78); transition: color .2s; }
.header__nav a:hover, .header__nav a[aria-current] { color: #fff; }
.header__shop { justify-self: end; font: 400 18px/1 var(--display); letter-spacing: .02em; display: none; }

.page { padding: 0 var(--gutter); max-width: 1320px; margin: 0 auto; }

/* intro */
.intro { padding: clamp(28px, 6vh, 56px) 0 clamp(16px, 3vh, 28px); }
.intro h1 { font-size: clamp(44px, 6vw, 72px); }
.intro p { margin-top: 12px; color: var(--mute); max-width: 460px; }

/* fit area */
.fit { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 80px); align-items: start; }

.viewer { position: relative; height: clamp(460px, 74vh, 700px); cursor: grab; }
.viewer:active { cursor: grabbing; }
.viewer canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; display: block; outline: none; }
.viewer__bar { position: absolute; z-index: 3; top: 0; left: 0; right: 0; display: flex; justify-content: space-between; align-items: center; pointer-events: none; }
.viewer__size { font: 400 18px/1 var(--display); letter-spacing: .03em; color: var(--mute); }
.views { display: flex; gap: 18px; pointer-events: auto; }
.views button { font: 500 11px/1 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); padding: 6px 0; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.views button:hover { color: var(--fg); }
.views button.on { color: var(--fg); border-bottom-color: var(--fg); }

.tags { position: absolute; inset: 0; z-index: 2; pointer-events: none; }
.tag {
  position: absolute; left: 0; top: 0; pointer-events: auto; will-change: transform;
  display: flex; align-items: center; gap: 6px; padding: 5px 10px 5px 6px; border-radius: 100px;
  background: rgba(0, 0, 0, .82); border: 1px solid rgba(255, 255, 255, .55); color: #fff;
  font: 500 11.5px/1 var(--body); white-space: nowrap; transition: opacity .3s;
}
.tag b { font: 400 14px/1 var(--display); width: 16px; text-align: center; }
.tag.behind { opacity: .25; }
.tag.dim { opacity: .3; }
.tag.hide { opacity: 0; pointer-events: none; }
.hint { position: absolute; z-index: 3; left: 0; right: 0; bottom: 6px; text-align: center; font: 500 10.5px/1 var(--body); letter-spacing: .16em; text-transform: uppercase; color: var(--dim); pointer-events: none; transition: opacity .6s; }
.hint.gone { opacity: 0; }
.fallback { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px; text-align: center; color: var(--mute); }

/* details column */
.details { padding-top: 4px; }
.row-head { display: flex; justify-content: space-between; align-items: baseline; }
.row-head h2 { font-size: 32px; }
.units { display: flex; gap: 16px; }
.units button { font: 500 11px/1 var(--body); letter-spacing: .14em; color: var(--dim); padding: 6px 0; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.units button:hover { color: var(--fg); }
.units button[aria-pressed="true"] { color: var(--fg); border-bottom-color: var(--fg); }

.sizes { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 26px 0 34px; }
.sizes button { font: 400 24px/1 var(--display); letter-spacing: .03em; color: var(--dim); padding: 4px 0 6px; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.sizes button:hover { color: var(--fg); }
.sizes button[aria-pressed="true"] { color: var(--fg); border-bottom-color: var(--fg); }

.small-label { font: 500 11px/1 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); margin-bottom: 6px; }
.specs { border-top: 1px solid var(--hair); }
.spec { display: grid; grid-template-columns: 22px 1fr auto; align-items: center; gap: 14px; width: 100%; text-align: left; padding: 18px 0; border-bottom: 1px solid var(--hair); }
.spec__k { font: 400 20px/1 var(--display); color: var(--mute); }
.spec__name { font: 500 14px/1.3 var(--body); }
.spec__hint { display: block; font-weight: 400; font-size: 12.5px; color: var(--mute); margin-top: 3px; }
.spec__v { font: 400 34px/1 var(--display); letter-spacing: .02em; white-space: nowrap; }
.spec__v small { font: 500 11px/1 var(--body); color: var(--mute); margin-left: 5px; text-transform: uppercase; letter-spacing: .1em; }
.spec.on .spec__k, .spec:hover .spec__k { color: var(--fg); }

/* finder */
.finder { margin-top: 48px; }
.finder h2 { font-size: 32px; }
.finder > p { margin-top: 8px; color: var(--mute); }
.finder form { display: flex; gap: 14px; align-items: center; margin-top: 20px; flex-wrap: wrap; }
.field { flex: 1 1 180px; display: flex; align-items: center; border-bottom: 1px solid rgba(255, 255, 255, .5); }
.field input { width: 100%; min-width: 0; border: 0; outline: 0; background: none; padding: 12px 0; font: 400 16px/1 var(--body); }
.field input::placeholder { color: var(--dim); }
.field span { font: 500 11px/1 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--mute); }
.field:focus-within { border-bottom-color: #fff; }
.check { display: flex; align-items: center; gap: 10px; margin-top: 16px; color: var(--mute); cursor: pointer; width: fit-content; }
.check input { width: 15px; height: 15px; accent-color: #fff; }
.result { display: none; margin-top: 26px; gap: 20px; align-items: center; grid-template-columns: auto 1fr; }
.result.show { display: grid; animation: fade .5s ease; }
.result__size { font: 400 64px/.9 var(--display); }
.result__txt { color: var(--mute); }
.result__txt b { color: var(--fg); font-weight: 500; }
@keyframes fade { from { opacity: 0; } }

/* pill button, same as the store */
.pill {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  padding: 16px 24px; border: 1px solid #fff; border-radius: 100px;
  font: 400 14px/1 var(--body); text-transform: uppercase; color: #fff; background: #000;
  transition: background .25s, color .25s;
}
.pill:hover { background: #fff; color: #000; }

/* blocks */
.block { margin-top: clamp(72px, 12vh, 120px); }
.block > h2 { font-size: 32px; margin-bottom: 22px; }
.tbl-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 520px; }
th, td { padding: 16px 12px 16px 0; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--hair); }
th { font: 400 16px/1 var(--display); letter-spacing: .04em; color: var(--mute); }
td { font: 400 14px/1 var(--body); color: var(--mute); }
td:first-child { font: 400 20px/1 var(--display); letter-spacing: .03em; }
tbody tr { cursor: pointer; }
tbody tr:hover td, tbody tr.on td { color: var(--fg); }
tbody tr.on td:first-child { text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 1px; }
.note { margin-top: 14px; font-size: 12px; color: var(--dim); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 4vw, 56px); }
.steps h3 { font-size: 24px; }
.steps p { margin-top: 10px; color: var(--mute); }
.tip { margin-top: 36px; color: var(--mute); }

.end { margin-top: clamp(80px, 14vh, 140px); text-align: center; }
.end h2 { font-size: clamp(36px, 5vw, 56px); margin-bottom: 28px; }
.footer { padding: 72px var(--gutter) calc(32px + env(safe-area-inset-bottom)); text-align: center; font-size: 12px; color: var(--dim); }

@media (max-width: 900px) {
  .fit { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .header__nav { display: none; }
  .header { grid-template-columns: 1fr auto; }
  .header__shop { display: block; }
}
@media (max-width: 420px) {
  .viewer { height: 480px; }
  .spec__v { font-size: 28px; }
  .finder form .pill { width: 100%; }
}