/* Parkur — shared site styles. Tokens mirror Shared/Design/Tokens.swift. */

:root {
  --canvas: #F7F5F0;
  --surface: #FFFFFF;
  --sunken: #EFECE5;
  --ink: #1D1B18;
  --ink-2: #6B665E;
  --ink-3: #A29C92;
  --hairline: #E5E1D9;
  --clay: #C4572E;
  --clay-text: #A8441F;
  --clay-soft: #F5E4DA;
  --on-accent: #FFFFFF;
  --raised: #FFFFFF;

  --sage: #6A8B6C;  --sage-soft: #E5ECE2;
  --slate: #5A7793; --slate-soft: #E2E8EE;
  --ochre: #A27E2C; --ochre-soft: #F1E9D4;
  --plum: #8A5F84;  --plum-soft: #EDE2EB;
  --teal: #3F8682;  --teal-soft: #DCEBE9;
  --rose: #AD6267;  --rose-soft: #F3E1E1;

  --shadow-s: 0 1px 2px rgb(29 27 24 / 0.06), 0 4px 12px -4px rgb(29 27 24 / 0.08);
  --shadow-m: 0 1px 2px rgb(29 27 24 / 0.05), 0 18px 40px -18px rgb(29 27 24 / 0.22);
  --shadow-l: 0 2px 4px rgb(29 27 24 / 0.05), 0 40px 80px -32px rgb(29 27 24 / 0.32);

  --serif: ui-serif, "New York", "Iowan Old Style", Charter, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, "Segoe UI", Roboto, sans-serif;
  --ease: cubic-bezier(0.22, 0.8, 0.24, 1);
  --spring: cubic-bezier(0.34, 1.45, 0.64, 1);

  --page: 1120px;
  --gutter: 20px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #11100F;
    --surface: #1B1A18;
    --sunken: #181715;
    --ink: #F3F0EA;
    --ink-2: #A6A097;
    --ink-3: #6F6A63;
    --hairline: #2C2A27;
    --clay: #EC7A4C;
    --clay-text: #EF8A60;
    --clay-soft: #35221A;
    --on-accent: #11100F;
    --raised: #3A3733;

    --sage: #93B593;  --sage-soft: #1E281E;
    --slate: #8DA9C6; --slate-soft: #1B232D;
    --ochre: #D6B062; --ochre-soft: #2B2416;
    --plum: #BC93B4;  --plum-soft: #281D26;
    --teal: #74B8B2;  --teal-soft: #172826;
    --rose: #D9979A;  --rose-soft: #2C1C1D;

    --shadow-s: 0 1px 2px rgb(0 0 0 / 0.4), 0 4px 12px -4px rgb(0 0 0 / 0.4);
    --shadow-m: 0 1px 2px rgb(0 0 0 / 0.4), 0 18px 40px -18px rgb(0 0 0 / 0.7);
    --shadow-l: 0 2px 4px rgb(0 0 0 / 0.4), 0 40px 80px -32px rgb(0 0 0 / 0.8);
  }
}

/* ---------- Language: one language visible at a time ---------- */

html[data-lang="en"] [lang="tr"]:not(html),
html[data-lang="tr"] [lang="en"]:not(html),
html:not([data-lang]) [lang="tr"]:not(html) { display: none !important; }

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img { max-width: 100%; }

a { color: var(--clay-text); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }

:focus-visible { outline: 2px solid var(--clay); outline-offset: 3px; border-radius: 6px; }

::selection { background: var(--clay-soft); color: var(--ink); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

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

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 22px;
  border-radius: 999px; border: 0;
  font: 600 16px/1 var(--sans); letter-spacing: -0.01em;
  text-decoration: none; cursor: pointer;
  transition: transform 0.4s var(--spring), background-color 0.2s, box-shadow 0.3s var(--ease);
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--ink); color: var(--canvas); box-shadow: var(--shadow-s); }
.btn-primary:hover { box-shadow: var(--shadow-m); transform: translateY(-1px); }
.btn-primary svg { width: 18px; height: 18px; flex: none; }
.btn-small { min-height: 36px; padding: 0 16px; font-size: 14px; }
.btn-soon { background: var(--clay-soft); color: var(--clay-text); }
.btn-quiet { background: transparent; color: var(--ink-2); padding: 0 6px; font-weight: 500; }
.btn-quiet:hover { color: var(--ink); }
.btn-quiet svg { width: 16px; height: 16px; transition: transform 0.4s var(--spring); }
.btn-quiet:hover svg { transform: translateY(2px); }

/* ---------- Site header ---------- */

.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--canvas) 84%, transparent);
  -webkit-backdrop-filter: saturate(1.5) blur(16px);
  backdrop-filter: saturate(1.5) blur(16px);
}
.site-nav .bar {
  max-width: var(--page); margin: 0 auto; padding: 12px var(--gutter);
  display: flex; align-items: center; gap: 20px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); text-decoration: none;
  font: 600 21px/1 var(--serif); letter-spacing: -0.01em;
}
.brand img { width: 30px; height: 30px; border-radius: 7px; box-shadow: 0 0 0 0.5px rgb(0 0 0 / 0.1), var(--shadow-s); }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav-links a:not(.btn) { color: var(--ink-2); text-decoration: none; font-size: 15px; }
.nav-links a:not(.btn):hover { color: var(--ink); }

.lang-toggle {
  display: inline-flex; padding: 3px; gap: 2px;
  border-radius: 999px; background: var(--sunken);
}
.lang-toggle button {
  border: 0; background: transparent; cursor: pointer;
  min-width: 38px; height: 28px; padding: 0 10px; border-radius: 999px;
  font: 600 12.5px/1 var(--sans); letter-spacing: 0.02em; color: var(--ink-2);
  transition: background-color 0.25s, color 0.25s;
}
.lang-toggle button[aria-pressed="true"] { background: var(--raised); color: var(--ink); box-shadow: var(--shadow-s); }

/* The reading line: solid behind you, dotted ahead. */
.nav-progress { position: relative; height: 2px; }
.nav-progress::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle, var(--ink-3) 0.9px, transparent 1.3px) 0 50% / 8px 2px repeat-x;
  opacity: 0; transition: opacity 0.4s;
}
.nav-progress span {
  position: absolute; inset: 0; background: var(--clay);
  transform-origin: 0 50%; transform: scaleX(var(--read, 0));
  border-radius: 0 2px 2px 0;
}
.scrolled .nav-progress::before { opacity: 0.7; }

@media (max-width: 640px) {
  .nav-links a.hide-s { display: none; }
  .nav-links { gap: 12px; }
}

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

.site-footer { border-top: 1px solid var(--hairline); margin-top: 24px; padding: 56px 0 40px; color: var(--ink-2); font-size: 15px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 32px; }
.foot-brand p { margin: 12px 0 0; max-width: 26ch; }
.site-footer h3 { margin: 0 0 12px; font: 600 13px/1.2 var(--sans); color: var(--ink); letter-spacing: 0.01em; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 8px 0; }
.site-footer a:not(.brand) { color: var(--ink-2); text-decoration: none; }
.site-footer a:not(.brand):hover { color: var(--clay-text); }
.foot-base {
  margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--hairline);
  display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between;
  font-size: 13px; color: var(--ink-3);
}
.foot-base p { margin: 0; max-width: 70ch; }

@media (max-width: 760px) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
}

/* ---------- Document pages (support, privacy, terms) ---------- */

.doc { max-width: 720px; margin: 0 auto; padding: 56px var(--gutter) 64px; }
.doc h1 { font: 500 clamp(36px, 6vw, 52px)/1.08 var(--serif); letter-spacing: -0.02em; margin: 0 0 10px; }
.doc h2 { font: 600 23px/1.25 var(--serif); margin: 44px 0 8px; }
.doc .meta { color: var(--ink-2); font-size: 15px; margin: 0; }
.doc .lead {
  font-size: 19px; line-height: 1.55; margin: 28px 0 0; padding: 20px 22px;
  background: var(--surface); border-radius: 20px; box-shadow: var(--shadow-s);
}
.doc ul { padding-left: 1.2em; }
.doc li { margin: 6px 0; }
.doc .course-rule { display: block; width: 100%; height: 28px; margin: 32px 0 0; overflow: visible; }
.course-rule .rule-track { fill: none; stroke: var(--ink-3); stroke-width: 2.4; stroke-linecap: round; stroke-dasharray: 0.1 7.5; opacity: 0.85; }
.course-rule .rule-ink { fill: none; stroke: var(--clay); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 0.34 1; }
.motion .course-rule .rule-ink { animation: rule-ink 1.8s var(--ease) 0.25s both; }
@keyframes rule-ink { from { stroke-dasharray: 0 1; } }
.doc h2 + p, .doc h2 + ul { margin-top: 0; }
.doc section[lang] > h1 { scroll-margin-top: 80px; }

.doc-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 36px; }
.doc-nav a {
  padding: 7px 14px; border-radius: 999px; font-size: 14px; text-decoration: none;
  color: var(--ink-2); background: var(--sunken);
}
.doc-nav a[aria-current="page"] { background: var(--clay-soft); color: var(--clay-text); font-weight: 600; }

.contact-card {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: 16px; padding: 20px 22px; border-radius: 20px; background: var(--surface); box-shadow: var(--shadow-s);
}
.contact-card p { margin: 0; }

@media (max-width: 480px) {
  :root { --gutter: 16px; }
  body { font-size: 16px; }
  .doc { padding-top: 36px; }
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}