/* Calpin Labs — styles.css
   No external fonts or assets. System font stacks only. */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", system-ui, "Segoe UI", Roboto, sans-serif;
  --font-serif: "New York", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, ui-serif, serif;

  --bg: #f6f8f9;
  --bg-elev: #ffffff;
  --ink: #12181d;
  --ink-2: #4f5b66;
  --ink-3: #66727c;
  --line: rgba(18, 24, 29, 0.10);
  --teal: #0a7585;
  --teal-strong: #075f6d;
  --teal-soft: rgba(10, 117, 133, 0.10);
  --glow: rgba(60, 200, 220, 0.28);
  --shadow: 0 1px 2px rgba(18, 24, 29, 0.06), 0 12px 32px -12px rgba(18, 24, 29, 0.25);
  --shot-accent: var(--accent, var(--teal));

  --wrap: 1080px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 18px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1013;
    --bg-elev: #13191e;
    --ink: #eaeef1;
    --ink-2: #a5b0b9;
    --ink-3: #8a95a0;
    --line: rgba(234, 238, 241, 0.10);
    --teal: #5fdce9;
    --teal-strong: #8ae8f1;
    --teal-soft: rgba(95, 220, 233, 0.12);
    --glow: rgba(60, 200, 220, 0.16);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 16px 40px -14px rgba(0, 0, 0, 0.7);
    --shot-accent: var(--accent-dark, var(--accent, var(--teal)));
  }
}

/* ---------- Base ---------- */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem; /* 17px, iOS body size */
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }

a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 0.16em; }
a:hover { color: var(--teal-strong); }

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(100% - 2 * var(--gutter), var(--wrap));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 10px;
  font-weight: 600;
  z-index: 10;
}
.skip-link:focus-visible { top: 12px; }

/* ---------- Header ---------- */

.site-header {
  padding-top: max(18px, env(safe-area-inset-top));
}

.site-header__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 8px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.wordmark:hover { color: var(--ink); }
.wordmark__mark { border-radius: 7px; flex: none; }

.site-nav { display: flex; gap: 22px; }
.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 6px 2px;
}
.site-nav a:hover { color: var(--ink); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding-block: clamp(56px, 12vw, 128px) clamp(48px, 9vw, 96px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto auto -10% -20%;
  width: 70vw;
  max-width: 640px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(closest-side, var(--glow), transparent 72%);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
}

.hero__title {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(2.5rem, 9.5vw, 5.75rem);
  line-height: 1.02;
  font-weight: 650;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.hero__title em,
.section-title em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--teal);
}

.hero__lede {
  margin: 28px 0 0;
  max-width: 44ch;
  font-size: clamp(1.0625rem, 1rem + 0.5vw, 1.3125rem);
  line-height: 1.5;
  color: var(--ink-2);
  text-wrap: pretty;
}

.hero__cta { margin: 30px 0 0; }

.link-arrow {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.link-arrow span { display: inline-block; transition: transform 0.25s ease; }
.link-arrow:hover span { transform: translateY(3px); }

/* ---------- Sections ---------- */

.section-title {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.section-note {
  margin: 8px 0 0;
  color: var(--ink-2);
}

.apps {
  padding-block: clamp(24px, 5vw, 56px) clamp(40px, 8vw, 96px);
  border-top: 1px solid var(--line);
}

/* ---------- App entries ---------- */

.app-list {
  list-style: none;
  margin: clamp(32px, 6vw, 64px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.app {
  padding: clamp(22px, 4vw, 40px);
  border-radius: var(--radius);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.app article {
  display: grid;
  gap: 28px;
}

.app__head {
  display: flex;
  align-items: center;
  gap: 16px;
}

.app__icon {
  flex: none;
  width: 72px;
  height: 72px;
  border-radius: 17px; /* ~24% like iOS */
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.08), 0 6px 16px -6px rgba(0, 0, 0, 0.35);
}

.app__meta { min-width: 0; }

.app__index {
  margin: 0 0 2px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--shot-accent);
}

.app__name {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.15;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.app__subname {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--ink-3);
  margin-top: 2px;
}

.app__genre {
  margin: 8px 0 0;
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.app__lede {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.45;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.app__points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  color: var(--ink-2);
}

.app__points li {
  position: relative;
  padding-left: 22px;
  text-wrap: pretty;
}

.app__points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--shot-accent);
}

.app__body {
  display: grid;
  gap: 20px;
  align-content: start;
}

.store-link {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.store-link:hover {
  color: var(--bg);
  background: var(--teal-strong);
  transform: translateY(-1px);
}
.store-link:active { transform: translateY(0); }
.store-link svg { transition: transform 0.2s ease; }
.store-link:hover svg { transform: translate(1px, -1px); }

.app__media {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 14px;
  padding: 22px 12px;
  border-radius: 14px;
  background:
    radial-gradient(120% 90% at 50% 100%, color-mix(in srgb, var(--shot-accent) 22%, transparent), transparent 70%),
    var(--bg);
  isolation: isolate;
}

.app__media img {
  width: min(42%, 150px);
  border-radius: 12px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--bg-elev);
}

.app__media img:nth-child(2) { transform: translateY(18px); }

/* ---------- About ---------- */

.about {
  padding-block: clamp(40px, 8vw, 96px);
  border-top: 1px solid var(--line);
}

.about__text {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: clamp(1.125rem, 1rem + 0.8vw, 1.5rem);
  line-height: 1.45;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 28px max(28px, env(safe-area-inset-bottom));
  font-size: 0.9rem;
  color: var(--ink-3);
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
}
.site-footer p { margin: 0; }

/* ---------- 404 ---------- */

.notfound {
  min-height: 60vh;
  display: grid;
  align-content: center;
  padding-block: clamp(56px, 12vw, 128px);
}
.notfound h1 {
  margin: 0;
  font-size: clamp(2.25rem, 8vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 650;
}
.notfound h1 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--teal);
}
.notfound p { margin: 20px 0 0; max-width: 44ch; color: var(--ink-2); }
.notfound .link-arrow { display: inline-block; margin-top: 28px; }

/* ---------- Larger screens ---------- */

@media (min-width: 768px) {
  .app article {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(28px, 5vw, 64px);
  }

  .app__media { padding: 28px 20px; }
  .app__media img { width: 150px; }

  /* Alternate media side for rhythm */
  .app-list > li:nth-child(even) article { grid-template-columns: auto minmax(0, 1fr); }
  .app-list > li:nth-child(even) .app__media { order: -1; }
}

@media (min-width: 1024px) {
  .app__media img { width: 165px; }
  .app__name { font-size: 1.75rem; }
}

/* ---------- Motion ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.js .hero .reveal:nth-child(2) { transition-delay: 0.08s; }
.js .hero .reveal:nth-child(3) { transition-delay: 0.16s; }
.js .hero .reveal:nth-child(4) { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .link-arrow span,
  .store-link,
  .store-link svg { transition: none; }
  .store-link:hover { transform: none; }
  .link-arrow:hover span,
  .store-link:hover svg { transform: none; }
}

/* ---------- App links row (home cards) ---------- */

.app__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  margin-top: 4px;
}
.app__links .store-link { margin-top: 0; }

.app__more {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.app__more span { display: inline-block; transition: transform 0.25s ease; }
.app__more:hover { color: var(--ink); }
.app__more:hover span { transform: translateX(3px); }

/* ---------- App detail pages ---------- */

.app-hero {
  padding-block: clamp(40px, 8vw, 88px) clamp(28px, 5vw, 48px);
}

.app-hero__head {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 22px);
}

.app-hero__icon {
  flex: none;
  width: clamp(72px, 16vw, 96px);
  height: clamp(72px, 16vw, 96px);
  border-radius: 22%;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.08), 0 10px 24px -10px rgba(0, 0, 0, 0.4);
}

.app-hero__name {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.25rem);
  line-height: 1.05;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.app-hero__sub {
  display: block;
  margin-top: 4px;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
  color: var(--ink-3);
  letter-spacing: 0;
}

.app-hero .hero__lede { margin-top: 22px; }

.app-about {
  padding-block: clamp(28px, 6vw, 64px);
  border-top: 1px solid var(--line);
}

.app-about p {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--ink-2);
  line-height: 1.6;
  text-wrap: pretty;
}
.app-about p:first-of-type { margin-top: 22px; }

.app-gallery {
  padding-block: clamp(28px, 6vw, 64px);
  border-top: 1px solid var(--line);
}

.gallery__row {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(14px, 4vw, 28px);
  padding: clamp(20px, 4vw, 36px) clamp(14px, 4vw, 28px);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 50% 100%, color-mix(in srgb, var(--accent, var(--teal)) 20%, transparent), transparent 70%),
    var(--bg-elev);
  border: 1px solid var(--line);
}

.gallery__row img {
  width: min(40%, 190px);
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--bg-elev);
}

.app-legal {
  padding-block: clamp(24px, 5vw, 48px) clamp(48px, 8vw, 88px);
  border-top: 1px solid var(--line);
}

.app-legal__row {
  margin: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
}

/* ---------- Legal / prose pages ---------- */

.legal {
  padding-block: clamp(40px, 8vw, 88px) clamp(48px, 8vw, 96px);
}

.prose-wrap { max-width: 720px; }

.legal__title {
  margin: 6px 0 0;
  font-size: clamp(2rem, 7vw, 3rem);
  line-height: 1.05;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.legal .page-meta {
  margin: 18px 0 0;
  padding: 12px 16px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--ink-3);
  font-size: 0.9rem;
  max-width: 62ch;
}

.prose { margin-top: 26px; color: var(--ink-2); }

.prose h2 {
  margin: 44px 0 0;
  font-size: 1.25rem;
  font-weight: 650;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.prose p { margin: 14px 0 0; max-width: 68ch; line-height: 1.65; text-wrap: pretty; }

.legal__back { margin-top: 48px; }