/* =========================================================
   ICHIGO STUDIO — DESIGN TOKENS (v4, "The Desk")
   Paper + ink, handmade, editorial. Single light palette.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400..800&family=Caveat:wght@500;600;700&family=Fraunces:ital,opsz,wght@0,9..144,300..700;1,9..144,300..700&family=Space+Mono:wght@400;700&display=swap');

:root {
  /* ---- Paper ---- */
  --paper:        #FFF1E3;   /* body background */
  --paper-deep:   #F7DFC7;
  --paper-shade:  #E3BE9B;
  --paper-soft:   #FFF8ED;
  --card:         #FFF9EF;   /* pin cards + modals */
  --polaroid:     #FFFDF7;
  --sticky:       #FFF0A8;   /* yellow notes */

  /* ---- Ink ---- */
  --ink:          #26171B;
  --ink-soft:     #644A46;
  --ink-faint:    #987C72;
  --pencil:       #46302D;

  /* ---- Lines ---- */
  --rule:         rgba(92, 56, 44, 0.20);
  --grid-line:    rgba(154, 86, 54, 0.07);

  /* ---- Accents ---- */
  --berry:        #F04462;
  --berry-deep:   #B92745;
  --berry-soft:   #FFD3DC;
  --berry-tint:   #FFF4F3;
  --mint:         #249B8E;
  --mint-soft:    #C7F0E8;
  --butter:       #F6C64A;
  --butter-soft:  #FFE8A8;
  --violet:       #7058CE;
  --violet-soft:  #E7DDFC;
  --peach:        #FF956F;
  --peach-soft:   #FFE0CE;

  /* ---- Legacy aliases (keep old --ichigo-* names working for any
         component that still references them). ---- */
  --ichigo-berry:       var(--berry);
  --ichigo-berry-deep:  var(--berry-deep);
  --ichigo-berry-soft:  var(--berry-soft);
  --ichigo-berry-tint:  var(--berry-tint);
  --ichigo-violet:      var(--violet);
  --ichigo-violet-soft: var(--violet-soft);
  --ichigo-mint:        var(--mint);
  --ichigo-mint-soft:   var(--mint-soft);
  --ichigo-butter:      var(--butter);
  --ichigo-butter-soft: var(--butter-soft);
  --ichigo-cream:       var(--paper);
  --ichigo-paper:       var(--card);
  --ichigo-ink:         var(--ink);
  --ichigo-ink-soft:    var(--ink-soft);
  --ichigo-ink-faded:   var(--ink-faint);
  --ichigo-line:        var(--rule);
  --panel-ink:          var(--ink);
  --panel-cream:        var(--paper);

  /* ---- Semantic ---- */
  --bg:        var(--paper);
  --surface:   var(--card);
  --text:      var(--ink);
  --text-soft: var(--ink-soft);
  --primary:   var(--berry);

  /* ---- Fonts ---- */
  --font-display: 'Fraunces', 'Times New Roman', Georgia, serif;
  --font-body:    'Bricolage Grotesque', 'Manrope', system-ui, -apple-system, sans-serif;
  --font-mono:    'Space Mono', 'JetBrains Mono', ui-monospace, monospace;
  --font-script:  'Caveat', 'Fraunces', cursive;

  /* Type scale */
  --fs-xs:   12px;
  --fs-sm:   14px;
  --fs-base: 16px;
  --fs-md:   18px;
  --fs-lg:   22px;
  --fs-xl:   28px;
  --fs-2xl:  40px;
  --fs-3xl:  64px;
  --fs-4xl:  96px;
  --fs-5xl:  128px;

  /* Spacing — 4px base */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px; --s-11: 160px;

  /* Radii */
  --r-sm: 3px;
  --r-md: 8px;
  --r-lg: 14px;
  --r-xl: 24px;
  --r-pill: 999px;

  /* Shadows — desk-style */
  --shadow-xs:   0 1px 2px rgba(38,23,27,0.06);
  --shadow-sm:   0 12px 24px -16px rgba(88,46,35,0.32);
  --shadow-md:   0 18px 38px -18px rgba(88,46,35,0.36);
  --shadow-pin:  0 18px 34px -22px rgba(88,46,35,0.38), 0 2px 0 rgba(255,255,255,0.7) inset, 0 1px 2px rgba(38,23,27,0.08);
  --shadow-pin-hover: 0 30px 58px -20px rgba(88,46,35,0.42), 0 2px 0 rgba(255,255,255,0.72) inset, 0 4px 8px rgba(38,23,27,0.1);
  --shadow-lg:   0 24px 54px -26px rgba(88,46,35,0.32);
  --shadow-xl:   0 42px 88px -44px rgba(38,23,27,0.56);
  --shadow-modal: 0 40px 80px -20px rgba(0,0,0,0.5);

  /* Motion */
  --ease-out:  cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);

  /* Surfaces */
  --nav-bg:         rgba(255,241,227,0.86);
  --modal-backdrop: rgba(38,23,27,0.72);
  --chip-bg:        rgba(255,249,239,0.94);
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern";
  -webkit-text-size-adjust: 100%;
}
/* iOS safe-area gutters — push sticky nav + fixed corners inside the notch. */
@supports (padding: env(safe-area-inset-bottom)) {
  body {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
}

/* Desk paper — graph-paper grid + mottled highlights. Applied to body so every
   page gets the same surface. Overflow-x:hidden keeps rotated ribbons in bounds. */
body {
  position: relative;
  background:
    linear-gradient(90deg, rgba(240,68,98,0.12) 0 92px, transparent 92px),
    linear-gradient(180deg, rgba(255,232,168,0.52) 0 116px, transparent 116px),
    linear-gradient(var(--grid-line) 1px, transparent 1px) 92px 116px / 28px 28px,
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 92px 116px / 28px 28px,
    repeating-linear-gradient(135deg, rgba(255,255,255,0.22) 0 1px, transparent 1px 18px),
    linear-gradient(105deg, rgba(255,211,220,0.52) 0 34%, transparent 34% 64%, rgba(199,240,232,0.42) 64% 100%),
    linear-gradient(180deg, rgba(255,248,237,0.94), rgba(255,225,198,0.50) 58%, rgba(255,248,237,0.88)),
    var(--paper);
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  pointer-events: none;
  z-index: 0;
}

body::before {
  top: 132px;
  right: -74px;
  width: min(34vw, 430px);
  height: 72vh;
  background:
    linear-gradient(rgba(38,23,27,0.035) 1px, transparent 1px) 0 0 / 100% 30px,
    linear-gradient(90deg, rgba(38,23,27,0.04) 1px, transparent 1px) 0 0 / 30px 100%,
    rgba(199,240,232,0.34);
  border: 1px dashed rgba(36,155,142,0.32);
  transform: rotate(4deg);
  box-shadow: 0 28px 70px -48px rgba(38,23,27,0.42);
}

body::after {
  left: -56px;
  bottom: 8vh;
  width: min(32vw, 400px);
  height: 44vh;
  background:
    repeating-linear-gradient(0deg, rgba(185,39,69,0.08) 0 1px, transparent 1px 18px),
    rgba(255,211,220,0.44);
  border: 1px solid rgba(185,39,69,0.14);
  transform: rotate(-5deg);
  box-shadow: 0 24px 60px -46px rgba(38,23,27,0.36);
}

main,
footer,
.desk-nav {
  position: relative;
}

main { z-index: 1; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: 0;
  margin: 0;
  font-variation-settings: "opsz" 144, "SOFT" 30;
}

.stage h1,
.stage h2,
.stage h3,
.stage h4,
.stage h5 {
  letter-spacing: 0 !important;
}

a { color: inherit; text-decoration: none; }

::selection { background: var(--berry); color: #fff; }

/* Desk buttons — pill, ink default, berry on hover */
.btn,
.btn-desk {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  background: var(--berry);
  color: #fff;
  border: 1.5px solid var(--berry);
  border-radius: var(--r-pill);
  cursor: pointer;
  box-shadow: 0 12px 22px -16px rgba(240,68,98,0.9);
  transition: background .2s var(--ease-soft), color .2s, border-color .2s, transform .2s var(--ease-out), box-shadow .2s var(--ease-out);
  text-decoration: none;
}
.btn:hover,
.btn-desk:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
  box-shadow: 0 16px 26px -18px rgba(38,23,27,0.8);
}
.btn--primary { background: var(--berry); border-color: var(--berry); color: #fff; }
.btn--primary:hover { background: var(--berry-deep); border-color: var(--berry-deep); }
.btn--ghost,
.btn-desk--ghost {
  background: rgba(255,249,239,0.66);
  color: var(--ink);
  border: 1.5px solid var(--ink);
  box-shadow: none;
}
.btn--ghost:hover,
.btn-desk--ghost:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* Tags — editorial chips used across cards + modals */
.tag, .t {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(240,68,98,0.08);
  color: var(--ink-soft);
  border: 1px solid transparent;
}
.tag--berry, .t--berry   { background: var(--berry-soft);  color: var(--berry-deep); }
.tag--mint,  .t--mint    { background: var(--mint-soft);   color: #1B6B65; }
.tag--violet,.t--violet  { background: var(--violet-soft); color: #4E2AA3; }
.tag--butter,.t--butter  { background: var(--butter-soft); color: #7A5A00; }

/* Accessibility — focus + skip */
:focus:not(:focus-visible) { outline: none; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible,
.btn:focus-visible, .btn-desk:focus-visible, .filter-pill:focus-visible, .pin:focus-visible, .book:focus-visible {
  outline: 2px solid var(--berry);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -48px; left: 12px;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  z-index: 200;
  transition: top .2s var(--ease-out);
}
.skip-link:focus, .skip-link:focus-visible { top: 12px; }

/* Scroll-reveal — opt-in via data-reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .55s var(--ease-out), transform .55s var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal].in-view { opacity: 1; transform: none; }

/* Back-to-top */
.back-to-top {
  position: fixed;
  bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  right: calc(24px + env(safe-area-inset-right, 0px));
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 500;
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translateY(8px);
  transition: opacity .2s, transform .2s var(--ease-out), visibility .2s, background .2s;
  z-index: 40;
}
.back-to-top.visible { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--berry); }
@media (max-width: 640px) {
  .back-to-top { width: 44px; height: 44px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); right: calc(16px + env(safe-area-inset-right, 0px)); }
}

/* Toast */
.toast {
  position: fixed;
  bottom: calc(28px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--ink);
  color: var(--paper);
  padding: 12px 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .25s, transform .25s var(--ease-out), visibility .25s;
  z-index: 60;
  max-width: calc(100vw - 48px);
}
.toast.visible { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  /* Decorative rotations can trigger vestibular discomfort — flatten them. */
  .pin, .book, .polaroid, .now-sticky, .receipt, .ribbon, .contact,
  .stamp, .notecard, .praise-card, .idx-card, .skill-note, .post-leaf,
  .bubble, .pol-caption .hand-date {
    transform: none !important;
  }
}

/* ===================================================================
   Heading anchor links — click the "#" next to any h2/h3 in longform
   content to copy a permalink to that section. Injected by js/enhance.js.
   =================================================================== */
.heading-anchor {
  display: inline-block;
  margin-left: 10px;
  padding: 0 6px;
  font-family: var(--font-mono);
  font-size: 0.6em;
  line-height: 1;
  color: var(--ink-faint);
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity .15s, color .15s, background .15s;
  border-radius: var(--r-sm);
  vertical-align: middle;
  text-decoration: none;
}
h2:hover > .heading-anchor,
h3:hover > .heading-anchor,
.heading-anchor:focus-visible { opacity: 1; color: var(--berry); }
.heading-anchor.copied { color: #fff; background: var(--berry); opacity: 1; }

/* ===================================================================
   Offline indicator chip — surfaces navigator.onLine === false.
   Injected by js/enhance.js into whatever nav is on the page.
   =================================================================== */
.offline-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  margin-left: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #7A5A00;
  background: var(--butter-soft);
  border: 1px solid rgba(122, 90, 0, 0.25);
  border-radius: var(--r-pill);
}
.offline-chip[hidden] { display: none; }
.offline-chip .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #7A5A00;
}

/* ===================================================================
   Language picker — injected into nav.desk-nav by js/i18n.js.
   Offers EN · 简 · 繁 · 日 and persists choice in localStorage.
   =================================================================== */
.lang-picker {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 6px;
}
.lang-picker .lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px 7px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  border: 1px dashed var(--rule);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: color .15s, background .15s, border-color .15s;
}
.lang-picker .lang-btn:hover,
.lang-picker.open .lang-btn {
  color: var(--ink);
  background: rgba(31,22,24,0.06);
  border-color: var(--ink-soft);
}
.lang-picker .lang-globe { color: var(--berry); font-size: 12px; line-height: 1; }
.lang-picker .lang-caret { font-size: 9px; opacity: 0.6; }

.lang-picker .lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: var(--paper, #FFF6E5);
  border: 1px solid rgba(31,22,24,0.10);
  border-radius: var(--r-sm, 10px);
  box-shadow: 0 12px 32px rgba(31,22,24,0.14), 0 2px 4px rgba(31,22,24,0.06);
  padding: 6px;
  display: grid;
  gap: 2px;
  z-index: 60;
}
.lang-picker .lang-menu[hidden] { display: none; }
.lang-picker .lang-opt {
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  font-family: var(--font-body);
  font-size: 14px;
  text-align: left;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  transition: background .12s;
}
.lang-picker .lang-opt:hover { background: rgba(31,22,24,0.06); }
.lang-picker .lang-opt.is-active { background: rgba(230,58,92,0.10); color: var(--berry-deep, #8B1E3F); }
.lang-picker .lang-opt-short {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 17px;
  color: var(--berry);
  text-align: center;
}
.lang-picker .lang-opt-full {
  font-size: 13px;
  letter-spacing: 0.01em;
}

/* Mobile — picker lives inside the collapsed nav-links stack */
@media (max-width: 820px) {
  .lang-picker { margin: 6px 0 0; width: 100%; }
  .lang-picker .lang-btn { width: 100%; justify-content: space-between; }
  .lang-picker .lang-menu { right: auto; left: 0; min-width: 100%; }
}

/* ===================================================================
   Subscribe menu — dropdown on the devlog hero exposing RSS + JSON Feed
   (+ optional email). See CONTENT.subscribe in data/content.js.
   =================================================================== */
.sub-wrap { position: relative; display: inline-block; margin-top: 24px; }
.sub-wrap .rss-pill { margin-top: 0; cursor: pointer; }
.sub-wrap .rss-pill .chev {
  font-size: 10px;
  margin-left: 2px;
  transition: transform .15s;
}
.sub-wrap.open .rss-pill .chev { transform: rotate(180deg); }
.sub-menu {
  position: absolute;
  top: calc(100% + 8px); left: 0;
  min-width: 280px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  padding: 6px;
  z-index: 20;
  display: grid; gap: 2px;
}
.sub-menu[hidden] { display: none; }
.sub-menu .sub-item {
  display: grid;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  transition: background .15s, color .15s;
  text-decoration: none;
}
.sub-menu .sub-item:hover { background: var(--paper-deep); }
.sub-menu .sub-item .l {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
}
.sub-menu .sub-item .n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  margin-top: 2px;
}

/* ===================================================================
   Devlog post TOC — inline panel above the post body. Renders when
   a post has 3+ h2/h3 headings. Same look as the case-study TOC.
   =================================================================== */
.post-toc {
  margin: 0 0 28px;
  padding: 16px 22px;
  background: var(--card);
  border: 1px dashed var(--rule);
  border-radius: var(--r-md);
  max-width: 100%;
}
.post-toc[hidden] { display: none; }
.post-toc .toc-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 10px;
}
.post-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}
.post-toc li a {
  display: inline-block;
  padding: 3px 0;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ink);
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.post-toc li.lvl-3 a { padding-left: 16px; color: var(--ink-soft); font-size: 13px; }
.post-toc li a:hover { color: var(--berry); border-bottom-color: var(--berry); }

/* ===================================================================
   Multi-platform share row — shared between devlog + case studies.
   =================================================================== */
.share-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
}
.share-row.post-share-row {
  margin-top: 16px;
  padding-top: 20px;
  border-top: 1px dashed var(--rule);
}
.share-row[hidden] { display: none; }
.share-row .share-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-right: 4px;
}
.share-row .share-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
  text-decoration: none;
}
.share-row .share-btn:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.share-row .share-btn.copied {
  background: var(--berry);
  color: #fff;
  border-color: var(--berry);
}

/* ===================================================================
   Print — résumé-friendly, chrome-free
   =================================================================== */
@media print {
  html, body { background: #fff !important; color: #111 !important; }
  body { background-image: none !important; }
  nav.desk-nav, .marquee, .back-to-top, .toast, .skip-link, .modal-back, .notecard,
  .ribbon-arrow, .tape, .tape-top, .pushpin, .featured-flag,
  .bubble, footer.desk-foot,
  .offline-chip, .sub-wrap, .post-toc, .share-row, .heading-anchor { display: none !important; }
  .stage { max-width: 100% !important; padding: 24px !important; }
  .pin, .book, .polaroid, .now-sticky, .receipt, .ribbon, .contact {
    transform: none !important; box-shadow: none !important;
    border: 1px solid #ccc !important; background: #fff !important;
    color: #111 !important;
  }
  h1, h2 { page-break-after: avoid; }
  section { page-break-inside: avoid; }
}