/* tallnutstudio.com — shared page styles on the Modernist tokens (styles.css via ds-base.js) */
:root {
  --leading: 28px;
  --half: 14px;
  --edge: clamp(20px, 5vw, 72px);
  --measure: 58ch;
}
/* 锚点平滑滚动由 site.js 显式触发；不用全局 scroll-behavior:smooth，
   避免浏览器把后退/前进的滚动位置恢复也做成动画（从顶部滑到原位置）。 */
/* & glyph fix: Archivo's spurless ampersand reads oddly at text sizes — serve U+26
   alone from the closest conventional grotesque; every other glyph stays Archivo */
@font-face { font-family: 'AmpFix'; src: local('Helvetica Neue'); unicode-range: U+26; }
@font-face { font-family: 'AmpFix'; src: local('Arial'); unicode-range: U+26; }
:root {
  --font-heading: 'AmpFix', 'Archivo', system-ui, sans-serif;
  --font-body: 'AmpFix', 'Archivo', system-ui, sans-serif;
}
body { margin: 0; text-wrap: pretty; }
a { color: var(--color-accent-700); }
a:hover { color: var(--color-accent); }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 var(--edge); }

/* language toggle: html[data-lang] hides the other language */
[data-lang="en"] [lang="zh"] { display: none !important; }
[data-lang="zh"] [lang="en"] { display: none !important; }

/* nav */
.nav { padding-inline: max(var(--edge), calc((100% - 1200px) / 2 + var(--edge))); }
.nav a { white-space: nowrap; }
a.nav-brand { text-decoration: none; color: var(--color-text); }
a.nav-brand:hover { color: var(--color-accent); }
@media (max-width: 560px) { .nav a.nav-link { display: none; } }

/* drawn structure */
.rule2 { height: 2px; border: 0; margin: 0; background: var(--color-divider); }

.kicker {
  display: block; font-size: 13px; line-height: var(--half);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-accent-700);
  font-feature-settings: "tnum" 1;
  margin: 0 0 calc(var(--leading) - var(--half));
}

/* hero */
.hero { padding: calc(3.5 * var(--leading)) 0 calc(3 * var(--leading)); }
.display {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(42px, 6.2vw, 84px);
  line-height: clamp(44.5px, 6.57vw, 89px);
  letter-spacing: -0.02em; margin: 0;
  margin-left: -0.058em;
  text-box: trim-both cap alphabetic;
}
.display .line { display: block; }
.hero .sub { font-size: 17px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(1.5 * var(--leading) - 1cap) 0 0;
  text-box: trim-both cap alphabetic; }
.hero .row { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center; margin-top: calc(1.5 * var(--leading)); }

/* app hero (detail pages): icon beside the display block */
.app-hero { display: flex; gap: clamp(24px, 4vw, 48px); align-items: flex-start; }
.app-hero .display { font-size: clamp(38px, 5vw, 68px); line-height: clamp(40.5px, 5.3vw, 72px); }
.app-icon { width: clamp(72px, 9vw, 112px); height: auto; display: block; flex: none; }
.app-icon.on-light { outline: 2px solid var(--color-divider); } /* the white Void tile needs its edge drawn */

/* App Store badge */
.store-badge { display: inline-block; line-height: 0; }
.store-badge img { height: 52px; width: auto; display: block; }

/* app rows on the home page */
.apps { padding: calc(3 * var(--leading)) 0 calc(2.5 * var(--leading)); }
.app-row { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  gap: calc(1.5 * var(--leading)) clamp(24px, 5vw, 96px); align-items: start;
  padding: calc(2 * var(--leading)) 0; }
.app-row + .app-row { border-top: 2px solid var(--color-divider); }
.a-num { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 15px; line-height: var(--leading); font-feature-settings: "tnum" 1;
  margin: 0 0 var(--leading); text-box: trim-both cap alphabetic; }
.a-head { display: flex; gap: var(--space-4); align-items: center; margin: 0 0 var(--leading); }
.a-head .app-icon { width: 72px; }
.a-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(28px, 3vw, 40px); line-height: calc(1.5 * var(--leading));
  letter-spacing: -0.015em; margin: 0; text-box: trim-both cap alphabetic; }
.a-sub { font-size: 13px; line-height: var(--half); letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); margin: var(--half) 0 0; }
.a-copy { font-size: 15.5px; line-height: var(--leading); margin: 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  max-width: 52ch; text-box: trim-both cap alphabetic; }
.a-links { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center; margin-top: calc(1.5 * var(--leading)); }

/* screenshot strips — market images in drawn 2px frames, square corners */
.shots { display: grid; gap: clamp(12px, 1.5vw, 24px); }
.shots.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shots.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.shots.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.shots figure { margin: 0; border: 2px solid var(--color-divider); }
.shots img { display: block; width: 100%; height: auto; aspect-ratio: 1320 / 2868; object-fit: cover; }

/* feature rows (detail pages) */
.features { padding: calc(3 * var(--leading)) 0 calc(2.5 * var(--leading)); }
.feature { display: grid; grid-template-columns: minmax(64px, 160px) minmax(0, 420px) minmax(0, 1fr);
  gap: var(--leading) clamp(24px, 4vw, 72px); align-items: baseline;
  padding: calc(1.5 * var(--leading)) 0; }
.feature + .feature { border-top: 2px solid var(--color-divider); }
.f-num { position: relative; font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 15px; line-height: var(--leading); color: var(--color-text);
  font-feature-settings: "tnum" 1; margin: 0; text-box: trim-both cap alphabetic; }
.f-num::before { content: ""; position: absolute; left: -24px; top: calc(0.5cap - 5px);
  width: 10px; height: 10px; background: var(--color-accent); }
@media (max-width: 1280px) { .f-num::before { display: none; } }
.f-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 24px; line-height: var(--leading); letter-spacing: -0.01em;
  margin: 0; text-box: trim-both cap alphabetic; }
.f-copy { font-size: 15.5px; line-height: var(--leading); margin: 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  max-width: 52ch; text-box: trim-both cap alphabetic; }

/* screenshots section (detail pages) */
.gallery { padding: calc(2.5 * var(--leading)) 0 calc(3 * var(--leading)); }

/* red poster close */
.close { background: var(--color-accent); color: var(--color-bg); }
.close .wrap { padding-top: calc(3 * var(--leading)); padding-bottom: calc(3 * var(--leading)); }
.close h3 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(34px, 4.2vw, 56px); line-height: clamp(36px, 4.45vw, 59.4px);
  letter-spacing: -0.015em; margin: 0; margin-left: -0.058em;
  text-box: trim-both cap alphabetic; }
.close h3 .line { display: block; }
.close .row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: calc(1.5 * var(--leading)); }
.close .btn-ghost { color: var(--color-bg); border-color: var(--color-bg); text-decoration: none; }
.close a.btn-ghost:hover { color: var(--color-bg); }

/* legal documents (privacy / terms — also shown inside the apps) */
.legal { padding: calc(2.5 * var(--leading)) 0 calc(3 * var(--leading)); max-width: 900px; }
.legal .table th:first-child, .legal .table td:first-child { width: 130px; }
.legal .table th:last-child, .legal .table td:last-child { width: 170px; }
.legal .doc-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(32px, 4vw, 52px); line-height: clamp(34px, 4.25vw, 55px);
  letter-spacing: -0.015em; margin: 0; margin-left: -0.058em; text-box: trim-both cap alphabetic; }
.legal .doc-meta { font-size: 13px; line-height: var(--half); letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); margin: var(--leading) 0 0; }
.legal section { border-top: 2px solid var(--color-divider); margin-top: calc(2 * var(--leading)); padding-top: calc(1.5 * var(--leading)); }
.legal h2 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 22px; line-height: var(--leading); letter-spacing: -0.01em; margin: 0; text-box: trim-both cap alphabetic; }
.legal p, .legal li { font-size: 15.5px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 78%, transparent); }
.legal p { margin: var(--half) 0 0; max-width: 68ch; }
.legal ul { margin: var(--half) 0 0; padding-left: 1.2em; max-width: 68ch; list-style: square; }
.legal li { margin-top: calc(var(--half) / 2); }
.legal li::marker { color: var(--color-accent); }

footer { padding: calc(2 * var(--leading)) 0; font-size: 13px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
  display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* responsive */
@media (max-width: 960px) {
  .app-row { grid-template-columns: 1fr; }
}
@media (max-width: 880px) {
  .feature { grid-template-columns: 1fr; gap: var(--half); }
  .f-copy { max-width: var(--measure); }
}
@media (max-width: 720px) {
  .hero { padding-top: calc(2.5 * var(--leading)); }
  .app-hero { flex-direction: column; }
  .shots.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shots.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .legal .table th:first-child, .legal .table td:first-child,
  .legal .table th:last-child, .legal .table td:last-child { width: auto; }
  article.legal .table { font-size: 13px; table-layout: fixed; width: 100%; }
  article.legal .table th, article.legal .table td { overflow-wrap: anywhere; }
}