/* ==========================================================================
   RIKYŪ — IRON DESIGN STUDIO
   Design System inherited directly from Masashi's IRON RECORDS (iz11weu/iron_records)
   Tokens: Washi/Kinari (#F9F7F5) & Sumi Ink (#333 / #1A1A1A), 1px rules,
   Cormorant Garamond + Karla + Noto Sans JP, Liquid Glass Dock & Sheets
   ========================================================================== */

:root {
  --bg: #f9f7f5;
  --text: #333;
  --ink: #1a1a1a;
  --sub: #756f67;
  --gray: #c6c2bc;
  --faint: #9a948c;
  --border: #e3e1de;
  --surface: #f0efed;
  --field: rgba(var(--shade-rgb), 0.05);
  --danger: #b07a74;
  /* 半透明の重ね色の元(ダークで入れ替える) */
  --bg-rgb: 249, 247, 245;
  --text-rgb: 51, 51, 51;
  --hi-rgb: 255, 255, 255;
  --shade-rgb: 31, 26, 20;
  /* 基本は墨色と濃淡、罫線で強弱をつける (Iron Records monochrome system) */
  --up: var(--text);
  --radius-s: 4px;
  --radius-m: 12px;
  --radius-l: 20px;
  --serif: 'Cormorant Garamond', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --sans: Karla, 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --gutter: 20px;
  --dock: 182px;
  /* Liquid Glass: 背景の上に浮かぶ半透明の層 */
  --glass-bg: rgba(var(--bg-rgb), 0.56);
  --glass-bg-thick: rgba(var(--bg-rgb), 0.93);
  --glass-bg-bar: rgba(var(--bg-rgb), 0.84);
  --glass-bg-dark: rgba(var(--text-rgb), 0.84);
  --glass-blur: blur(22px) saturate(1.7);
  --glass-blur-thick: blur(48px) saturate(1.8);
  --glass-border: rgba(var(--hi-rgb), 0.55);
  --glass-edge: rgba(var(--shade-rgb), 0.07);
  --glass-rim: inset 0 1px 0 rgba(var(--hi-rgb), 0.85), inset 0 -1px 0 rgba(var(--shade-rgb), 0.05), inset 0 0 14px rgba(var(--hi-rgb), 0.35);
  --glass-shadow: 0 10px 32px rgba(var(--shade-rgb), 0.13), 0 2px 6px rgba(var(--shade-rgb), 0.06);
}

/* ダークモード: 墨と生成りを入れ替える(html[data-theme='dark']) */
:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #1d1c1a;
  --text: #e9e5df;
  --ink: #f5f2ed;
  --sub: #a49e96;
  --gray: #5f5a54;
  --faint: #807a72;
  --border: #383531;
  --surface: #282623;
  --field: rgba(255, 255, 255, 0.07);
  --danger: #c9918a;
  --bg-rgb: 29, 28, 26;
  --text-rgb: 233, 229, 223;
  --hi-rgb: 62, 59, 55;
  --shade-rgb: 0, 0, 0;
  --glass-edge: rgba(255, 255, 255, 0.06);
}

/* 切り替えのとき、ボタンの位置から円が広がって色が入れ替わる (Iron Records View Transition) */
::view-transition-old(root),
::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-new(root) { animation: themeReveal 0.55s cubic-bezier(0.4, 0, 0.2, 1); }
@keyframes themeReveal {
  from { clip-path: circle(0 at var(--tx, 100%) var(--ty, 0)); }
  to { clip-path: circle(150% at var(--tx, 100%) var(--ty, 0)); }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  :root {
    --glass-bg: rgba(var(--bg-rgb), 0.96);
    --glass-bg-thick: rgba(var(--bg-rgb), 0.98);
    --glass-bg-bar: rgba(var(--bg-rgb), 0.98);
    --glass-bg-dark: rgba(var(--text-rgb), 0.95);
  }
}

* { box-sizing: border-box; }

html { -webkit-tap-highlight-color: transparent; background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}

#app {
  max-width: 540px;
  margin: 0 auto;
  min-height: 100svh;
  padding-bottom: calc(var(--dock) + env(safe-area-inset-bottom));
}

@media (min-width: 960px) {
  #app {
    max-width: 980px;
  }
}

button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; padding: 0; cursor: pointer; }
button:active { opacity: 0.85; transform: scale(0.98); }
input, textarea { -webkit-appearance: none; appearance: none; }

/* ---------- Header (Iron Records Exact Sticky Bar) ---------- */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(18px + env(safe-area-inset-top)) var(--gutter) 13px;
  position: sticky;
  top: 0;
  z-index: 25;
  background: var(--glass-bg-bar);
  -webkit-backdrop-filter: var(--glass-blur-thick);
  backdrop-filter: var(--glass-blur-thick);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(var(--hi-rgb), 0.7);
}

.brand-lockup {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.logo {
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.28em;
  font-weight: 500;
  margin: 0;
}

.logo-sub {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--faint);
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--sub);
  border-radius: 50%;
}
.icon-btn:hover {
  background: var(--field);
  color: var(--text);
}

.pill-badge {
  font-size: 10px;
  letter-spacing: 0.14em;
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--sub);
  background: var(--surface);
}

/* ---------- Page & Typography Tokens ---------- */

.page {
  padding: 0 var(--gutter);
  animation: fadeInUp 0.25s ease-out;
}

.label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--sub);
  text-transform: uppercase;
}

.num { font-family: Karla, sans-serif; font-weight: 400; letter-spacing: -0.01em; }
.unit { font-size: 12px; color: var(--sub); margin-left: 3px; letter-spacing: 0.04em; }
.diff { font-size: 11px; color: var(--sub); letter-spacing: 0.04em; }
.muted { color: var(--faint); }

/* ---------- Hero Brand Banner + Asymmetric Summary Grid (.summary-a from Iron Records) ---------- */

.hero-pitch {
  padding: 20px 0 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hero-pitch-kicker {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--sub);
}

.hero-pitch-title {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 400;
  letter-spacing: 0.05em;
  line-height: 1.35;
  margin: 0;
}

.summary-a {
  display: grid;
  grid-template-columns: 1.28fr 1fr;
  border-bottom: 1px solid var(--border);
  padding: 14px 0 0;
}

.summary-main {
  padding: 4px 14px 16px 0;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.summary-brand-name {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.15;
  letter-spacing: 0.08em;
  margin: 4px 0 2px;
  word-break: break-word;
}

.summary-value {
  font-size: 52px;
  line-height: 1;
  font-weight: 300;
  letter-spacing: -0.03em;
  margin: 6px 0 6px;
}
.summary-value .unit {
  font-size: 13px;
  margin-left: 5px;
  letter-spacing: 0.1em;
}

.summary-side {
  display: grid;
  grid-template-rows: repeat(3, auto);
}

.summary-mini {
  padding: 4px 0 8px 14px;
}
.summary-mini + .summary-mini {
  border-top: 1px solid var(--border);
  padding-top: 8px;
}
.summary-mini .num {
  white-space: nowrap;
  font-size: 18px;
  line-height: 1.25;
  margin: 2px 0 0;
}
.summary-mini .num .unit {
  font-size: 11px;
}

/* ---------- 7-Deliverable Strip (Modeled on Iron Records .week strip) ---------- */

.week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 12px 0 8px;
  border-bottom: 1px solid var(--border);
  gap: 2px;
}

.day {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 2px 8px;
  border-radius: var(--radius-m);
  transition: background 0.15s ease;
}

.day .dow {
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--sub);
}

.day .dom {
  font-size: 12px;
  font-weight: 500;
}

.day .cat-ja {
  font-size: 9.5px;
  color: var(--faint);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.day.selected {
  background: linear-gradient(to bottom, rgba(var(--hi-rgb), 0.85), rgba(var(--hi-rgb), 0.45));
  box-shadow: inset 0 1px 0 rgb(var(--hi-rgb)), inset 0 -1px 0 rgba(var(--shade-rgb), 0.05), 0 2px 8px rgba(var(--shade-rgb), 0.09);
  border: 1px solid rgba(var(--shade-rgb), 0.05);
  padding-top: 5px;
  padding-bottom: 7px;
}

.dots {
  display: flex;
  gap: 3px;
  height: 9px;
  align-items: center;
}
.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text);
}
.dot.hollow {
  background: transparent;
  border: 1px solid var(--gray);
  width: 7px;
  height: 7px;
}

/* ---------- Preset Prompt Chips Bar ---------- */

.preset-strip {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.preset-strip-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chip {
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 100px;
  background: var(--field);
  color: var(--sub);
  letter-spacing: 0.04em;
  text-align: left;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}
.chip:hover {
  border-color: var(--border);
  color: var(--text);
}
.chip.on {
  background: var(--text);
  color: var(--bg);
}

/* ---------- Section Head (Iron Records 1px solid var(--text) rule) ---------- */

.section {
  padding: 22px 0 4px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--text);
  margin-bottom: 12px;
}

.section-head .head-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.08em;
}
.section-head .head-btn:hover {
  color: var(--text);
}

.section-head .meta {
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.06em;
}

/* ---------- Rikyū Conversational Thread & Artifact Cards ---------- */

.thread-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-bottom: 24px;
}

.turn-card {
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
  animation: fadeInUp 0.28s ease-out;
}

/* 1. User Request Bubble */
.user-prompt-row {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}

.user-prompt-bubble {
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 18px 18px 4px 18px;
  font-size: 13.5px;
  letter-spacing: 0.03em;
  max-width: 88%;
  line-height: 1.5;
}

/* 2. Rikyū "考えました" (Thought Process Narrative) */
.thought-box {
  border-left: 2px solid var(--text);
  padding: 6px 0 6px 14px;
  margin: 0 0 16px;
}

.thought-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--sub);
  margin-bottom: 4px;
}

.thought-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text);
}

.thought-body {
  font-size: 13px;
  color: var(--text);
  line-height: 1.65;
  margin: 0;
}

.thought-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.thought-spec-tag {
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--sub);
  background: var(--surface);
  padding: 2px 8px;
  border-radius: var(--radius-s);
  border: 1px solid var(--border);
}

/* 3. Deliverable Artifact Frame */
.artifact-announce {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
}

.artifact-title {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: 0;
}

.artifact-slug {
  font-family: Karla, monospace;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.08em;
}

.artifact-stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  position: relative;
}

.artifact-canvas-wrap {
  width: 100%;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  background:
    radial-gradient(circle at 50% 35%, rgba(var(--hi-rgb), 0.7), transparent 75%),
    var(--surface);
}

.artifact-canvas-wrap.no-pad {
  padding: 0;
}

.artifact-svg-host svg {
  width: 100%;
  max-width: 340px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.artifact-controls {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.control-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sub);
  text-transform: uppercase;
}

/* Segmented Control (Iron Records .seg) */
.seg {
  display: flex;
  background: var(--field);
  border-radius: 100px;
  padding: 3px;
  gap: 2px;
  width: 100%;
}

.seg button {
  white-space: nowrap;
  flex: 1;
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 6px 8px;
  border-radius: 100px;
  color: var(--sub);
}

.seg button.on {
  background: linear-gradient(to bottom, rgba(var(--hi-rgb), 0.95), rgba(var(--hi-rgb), 0.6));
  color: var(--text);
  box-shadow: inset 0 1px 0 rgb(var(--hi-rgb)), inset 0 -1px 0 rgba(var(--shade-rgb), 0.05), 0 2px 6px rgba(var(--shade-rgb), 0.12);
}

/* Color Swatches */
.swatch-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.swatch-btn {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--border);
}
.swatch-btn.on {
  box-shadow: 0 0 0 2px var(--text);
  transform: scale(1.1);
}

/* Artifact Action Buttons Bar */
.artifact-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 4px;
}

.act-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 15px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  background: var(--field);
  color: var(--text);
  border: 1px solid var(--border);
  flex: 1;
  min-width: 120px;
}

.act-btn.primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

/* 4. Rikyū "次につくるもの" (What to Make Next — 3-Card Chain) */
.next-chain {
  margin-top: 16px;
}

.next-chain-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--sub);
  margin-bottom: 6px;
}

.next-list {
  border-top: 1px solid var(--border);
}

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 11px 4px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s ease;
}
.row:hover {
  background: var(--field);
}

.row .tag {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-family: Karla, sans-serif;
  color: var(--sub);
}

.row .main {
  flex: 1;
  min-width: 0;
}

.row .title {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 1px;
}

.row .detail {
  font-size: 11.5px;
  color: var(--faint);
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.row .end {
  flex: none;
  font-size: 12px;
  color: var(--sub);
}

/* ---------- 3D Canvas Host ---------- */
.three-stage {
  width: 100%;
  height: 330px;
  position: relative;
  cursor: grab;
  touch-action: none;
}
.three-stage:active {
  cursor: grabbing;
}
.three-stage canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}
.three-overlay-hint {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--sub);
  background: var(--glass-bg-bar);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid var(--border);
  pointer-events: none;
}

/* ---------- Mockup & Video Canvas ---------- */
.render-canvas {
  width: 100%;
  max-width: 440px;
  height: auto;
  border-radius: var(--radius-m);
  box-shadow: 0 8px 24px rgba(var(--shade-rgb), 0.12);
  display: block;
}

/* ---------- Embedded Web Preview & Mobile App Frame ---------- */
.web-preview-card {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(var(--shade-rgb), 0.08);
}

.web-browser-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--faint);
}

.web-browser-dots {
  display: flex;
  gap: 5px;
}
.web-browser-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--gray);
}

.phone-frame {
  width: 288px;
  margin: 0 auto;
  background: var(--bg);
  border: 6px solid var(--ink);
  border-radius: 38px;
  overflow: hidden;
  box-shadow: 0 14px 34px rgba(var(--shade-rgb), 0.18);
}

.phone-notch {
  width: 86px;
  height: 18px;
  background: var(--ink);
  border-radius: 100px;
  margin: 8px auto 6px;
}

/* ---------- All-7 Gallery Grid (STUDIO Tab) ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-bottom: 24px;
}

@media (min-width: 720px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.gallery-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

.gallery-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

/* ---------- Bottom Liquid Glass Dock (Iron Records Exact Pattern) ---------- */

.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  padding: 0 14px calc(10px + env(safe-area-inset-bottom));
  pointer-events: none;
}

.dock-inner {
  position: relative;
  max-width: 512px;
  margin: 0 auto;
  padding: 10px;
  border-radius: 28px;
  pointer-events: auto;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-edge);
  box-shadow: var(--glass-rim), var(--glass-shadow);
}

/* 上端の光る縁 */
.dock-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(to bottom, rgba(var(--hi-rgb), 0.95), rgba(var(--hi-rgb), 0.1) 45%, rgba(var(--hi-rgb), 0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  pointer-events: none;
}

.dock-prompt-form {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.dock-input {
  flex: 1;
  min-width: 0;
  height: 42px;
  border: 1px solid var(--border);
  outline: none;
  background: rgba(var(--bg-rgb), 0.85);
  border-radius: 100px;
  padding: 0 16px;
  font-size: 14px;
  color: var(--text);
}
.dock-input::placeholder {
  color: var(--faint);
}
.dock-input:focus {
  border-color: var(--text);
}

.dock-send-btn {
  height: 42px;
  padding: 0 18px;
  border-radius: 100px;
  background: var(--text);
  color: var(--bg);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.dock-actions {
  display: flex;
  gap: 8px;
}

.dock-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.dock-btn.primary {
  flex: 1;
  color: var(--bg);
  background: var(--text);
}

.dock-btn.secondary {
  flex: none;
  padding: 0 16px;
  color: var(--text);
  background: rgba(var(--text-rgb), 0.07);
}

/* THREAD / ALL 7 の切り替え(平らに) */
.tabs {
  --i: 0;
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 8px 0 0;
  padding: 3px;
  border-radius: 100px;
  background: rgba(var(--text-rgb), 0.07);
}
.tabs[data-tab='gallery'] { --i: 1; }
.tabs::before {
  content: '';
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc((100% - 6px) / 2);
  border-radius: 100px;
  transform: translateX(calc(var(--i) * 100%));
  transition: transform 0.38s cubic-bezier(0.34, 1.26, 0.64, 1);
  background: var(--bg);
}
.tabs button {
  position: relative;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--sub);
  padding: 6px 0;
  border-radius: 100px;
}
.tabs button.active { color: var(--text); }
.tabs button:active { transform: none; }

/* ---------- Bottom Sheet (Iron Records .overlay & .sheet) ---------- */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: rgba(var(--shade-rgb), 0.28);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

.sheet {
  width: 100%;
  max-width: 520px;
  max-height: 88svh;
  overflow-y: auto;
  background: var(--glass-bg-thick);
  -webkit-backdrop-filter: var(--glass-blur-thick);
  backdrop-filter: var(--glass-blur-thick);
  border-radius: 28px 28px 0 0;
  border: 1px solid rgba(var(--hi-rgb), 0.6);
  border-bottom: none;
  padding: 24px var(--gutter) calc(28px + env(safe-area-inset-bottom));
  box-shadow: inset 0 1px 0 rgba(var(--hi-rgb), 0.95), inset 0 0 18px rgba(var(--hi-rgb), 0.3), 0 -10px 40px rgba(var(--shade-rgb), 0.14);
  animation: slideUp 0.42s cubic-bezier(0.34, 1.26, 0.64, 1);
}

.sheet h2 {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  margin: 0 0 4px;
}

.sheet .lead {
  font-size: 12px;
  color: var(--faint);
  margin: 0 0 14px;
}

.field {
  width: 100%;
  border: none;
  outline: none;
  background: var(--field);
  border-radius: var(--radius-m);
  padding: 10px 14px;
  font-size: 14px;
}

.field-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--sub);
  margin: 12px 0 4px 2px;
}

.btn {
  display: block;
  width: 100%;
  padding: 13px;
  border-radius: 100px;
  background: var(--text);
  color: var(--bg);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2em;
  margin-top: 16px;
  text-align: center;
}
.btn.ghost {
  background: transparent;
  color: var(--faint);
  margin-top: 6px;
}

/* ---------- Toast (Iron Records Exact Toast) ---------- */

.toast {
  position: fixed;
  left: 50%;
  top: calc(16px + env(safe-area-inset-top));
  transform: translateX(-50%);
  z-index: 80;
  background: var(--glass-bg-dark);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  color: var(--bg);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 10px 20px;
  border-radius: 100px;
  box-shadow: inset 0 1px 0 rgba(var(--hi-rgb), 0.28), inset 0 -1px 0 rgba(0, 0, 0, 0.2), 0 8px 24px rgba(var(--shade-rgb), 0.22);
  animation: fadeInUp 0.25s ease-out;
  white-space: nowrap;
}

@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }