:root {
  --paper: #e9e6de;
  --paper-raised: rgba(250, 248, 241, 0.72);
  --paper-solid: #f4f1e9;
  --ink: #272921;
  --ink-soft: #66675d;
  --ink-faint: #8c8b80;
  --line: rgba(56, 59, 49, 0.15);
  --line-strong: rgba(56, 59, 49, 0.28);
  --accent: #7a8064;
  --accent-deep: #565d43;
  --accent-soft: rgba(122, 128, 100, 0.16);
  --grid-fine: rgba(76, 80, 63, 0.075);
  --grid-wide: rgba(76, 80, 63, 0.105);
  --surface: rgba(247, 244, 236, 0.55);
  --surface-quiet: rgba(247, 244, 236, 0.38);
  --glass-bg: rgba(255, 255, 255, 0.52);
  --glass-text: #272921;
  --glass-inset: rgba(255, 255, 255, 0.92);
  --glass-shadow: rgba(64, 60, 45, 0.13);
  --card-primary: rgba(132, 139, 103, 0.42);
  --card-secondary: rgba(255, 255, 255, 0.44);
  --ring-bg: rgba(66, 68, 57, 0.11);
  --ring-stroke: #565d43;
  --modal-backdrop: rgba(42, 42, 35, 0.32);
  --shadow-soft: 0 30px 80px rgba(61, 57, 44, 0.12);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme="dark"] {
  --paper: #20211d;
  --paper-raised: rgba(38, 39, 34, 0.78);
  --paper-solid: #292a25;
  --ink: #efeee7;
  --ink-soft: #b9b8af;
  --ink-faint: #8e8e85;
  --line: rgba(239, 238, 231, 0.12);
  --line-strong: rgba(239, 238, 231, 0.22);
  --accent: #adb391;
  --accent-deep: #c3c8a5;
  --accent-soft: rgba(173, 179, 145, 0.15);
  --grid-fine: rgba(201, 204, 179, 0.055);
  --grid-wide: rgba(201, 204, 179, 0.085);
  --surface: rgba(55, 56, 49, 0.48);
  --surface-quiet: rgba(55, 56, 49, 0.34);
  --glass-bg: rgba(255, 255, 255, 0.12);
  --glass-text: #f3f2eb;
  --glass-inset: rgba(255, 255, 255, 0.34);
  --glass-shadow: rgba(0, 0, 0, 0.32);
  --card-primary: rgba(155, 163, 120, 0.34);
  --card-secondary: rgba(237, 235, 219, 0.1);
  --ring-bg: rgba(239, 238, 231, 0.1);
  --ring-stroke: #c3c8a5;
  --modal-backdrop: rgba(8, 9, 7, 0.56);
  --shadow-soft: 0 30px 90px rgba(0, 0, 0, 0.24);
}

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

html {
  min-width: 320px;
  min-height: 100%;
  color-scheme: light;
  background: var(--paper);
  transition: background-color 320ms ease;
}

html[data-theme="dark"] { color-scheme: dark; }

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  transition: background-color 320ms ease, color 320ms ease;
  -webkit-tap-highlight-color: transparent;
}

button, input { font: inherit; }
button { color: inherit; }
button, a { -webkit-touch-callout: none; }

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-deep);
  outline-offset: 3px;
}

.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;
}

.ambient-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background-color: var(--paper);
  background-image: url("../images/paper-texture.jpeg");
  background-size: cover;
  background-position: center;
  opacity: 1;
  transition: background-color 320ms ease;
}

.ambient-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--paper);
  opacity: 0.78;
}

html[data-theme="dark"] .ambient-grid::after { opacity: 0.9; }

.grid-plane {
  position: absolute;
  z-index: 1;
  inset: -96px;
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.grid-plane--fine {
  background-image:
    linear-gradient(to right, var(--grid-fine) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-fine) 1px, transparent 1px);
  background-size: 24px 24px;
  animation: grid-drift 28s linear infinite;
}

.grid-plane--wide {
  background-image:
    linear-gradient(to right, var(--grid-wide) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-wide) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(circle at 50% 45%, black, transparent 77%);
  animation: grid-drift-wide 54s linear infinite;
}

html[data-motion="still"] .grid-plane { animation-play-state: paused; }

@keyframes grid-drift {
  to { transform: translate3d(24px, 24px, 0); }
}

@keyframes grid-drift-wide {
  to { transform: translate3d(-120px, 120px, 0); }
}

.page-shell {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 48px));
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(26px, env(safe-area-inset-top)) 0 max(20px, env(safe-area-inset-bottom));
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 24px;
}

.site-header {
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 13px;
  height: 13px;
  border: 2px solid var(--accent-deep);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px var(--paper);
  background: var(--accent);
}

.brand strong {
  display: block;
  font-size: 17px;
  line-height: 1.1;
  letter-spacing: 0.08em;
}

.header-actions { display: flex; align-items: center; gap: 10px; }

.scene {
  position: relative;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.refraction-card {
  position: absolute;
  z-index: 0;
  border-radius: 20px;
  background: var(--card-secondary);
  pointer-events: none;
  transition: transform 250ms ease, background-color 320ms ease;
}

.refraction-card.primary { background: var(--card-primary); }

.liquid-btn {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  overflow: hidden;
  border: 0;
  background: var(--glass-bg);
  color: var(--glass-text);
  cursor: pointer;
  user-select: none;
  box-shadow:
    inset 0 0 1.5px 1px var(--glass-inset),
    0 8px 24px var(--glass-shadow);
  backdrop-filter: blur(12px) saturate(105%);
  -webkit-backdrop-filter: blur(12px) saturate(105%);
  transition: transform 160ms ease, background-color 320ms ease, box-shadow 320ms ease;
}

.liquid-btn:hover { transform: translateY(-1px) scale(1.02); }
.liquid-btn:active { transform: translateY(1px) scale(0.97); }
.liquid-btn svg { width: 19px; height: 19px; stroke-width: 1.8; }

.liquid-surface {
  background-color: var(--glass-bg);
  box-shadow:
    inset 0 0 1.5px 1px var(--glass-inset),
    0 18px 48px var(--glass-shadow);
  backdrop-filter: blur(18px) saturate(105%);
  -webkit-backdrop-filter: blur(18px) saturate(105%);
  transition: background-color 320ms ease, box-shadow 320ms ease;
}

.liquid-control {
  box-shadow: inset 0 0 1px 0.5px var(--glass-inset), 0 5px 16px var(--glass-shadow);
  backdrop-filter: blur(12px) saturate(105%);
  -webkit-backdrop-filter: blur(12px) saturate(105%);
}

svg[data-liquid-glass-defs] {
  position: fixed;
  width: 0;
  height: 0;
  pointer-events: none;
}

.icon-scene, .close-scene { width: 46px; height: 46px; }
.icon-btn { width: 42px; height: 42px; padding: 0; border-radius: 50%; }

.focus-board {
  align-self: center;
  width: 100%;
  min-height: min(680px, calc(100dvh - 154px));
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(340px, 0.85fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 34px;
  background-color: var(--paper-raised);
  box-shadow: inset 0 0 1.5px 1px var(--glass-inset), var(--shadow-soft);
  backdrop-filter: blur(28px) saturate(105%);
  -webkit-backdrop-filter: blur(28px) saturate(105%);
}

.timer-panel {
  position: relative;
  min-width: 0;
  padding: clamp(30px, 4vw, 56px);
  display: grid;
  grid-template-rows: 1fr auto;
  border-right: 1px solid var(--line);
}

.timer-panel::after {
  content: "";
  position: absolute;
  right: 34px;
  bottom: 32px;
  width: 68px;
  height: 1px;
  background: var(--line-strong);
}

.section-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.16em;
}

h1, h2, p { margin-top: 0; }
h1 {
  margin-bottom: 0;
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 650;
  line-height: 1.22;
  letter-spacing: -0.03em;
}

h2 {
  margin-bottom: 0;
  font-size: 20px;
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.timer-stage {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
  padding: 14px 0;
}

.timer-orbit {
  position: relative;
  width: clamp(288px, 31vw, 372px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background-color: var(--glass-bg);
  overflow: hidden;
}

.timer-orbit::before,
.timer-orbit::after {
  content: "";
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
  pointer-events: none;
}

.timer-orbit::before { inset: 23px; border-style: dashed; opacity: 0.38; }
.timer-orbit::after { inset: 3px; opacity: 0.5; }

.timer-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer-bg-ring,
.timer-progress-ring {
  fill: none;
  stroke-width: 4;
}

.timer-bg-ring { stroke: var(--ring-bg); }
.timer-progress-ring {
  stroke: var(--ring-stroke);
  stroke-linecap: round;
  transition: stroke-dashoffset 300ms linear, stroke 320ms ease;
}

.timer-display {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.timer-mode-label {
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.time-digits {
  margin: 8px 0 9px;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Noto Serif TC", serif;
  font-size: clamp(64px, 7.6vw, 94px);
  font-weight: 500;
  font-variant-numeric: tabular-nums lining-nums;
  line-height: 0.95;
  letter-spacing: -0.07em;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.secondary-scene { width: 68px; height: 62px; }
.secondary-btn { width: 62px; height: 54px; padding: 0; border-radius: 27px; }
.play-scene { width: 186px; height: 78px; }
.play-btn { width: 178px; height: 68px; border-radius: 34px; font-size: 15px; font-weight: 700; }

.rhythm-panel {
  min-width: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  background: var(--surface-quiet);
}

.mode-section { padding: clamp(30px, 3.4vw, 48px); }
.duration-readout {
  min-width: 62px;
  color: var(--accent-deep);
  font-family: "Iowan Old Style", Georgia, serif;
  font-size: 21px;
  line-height: 1;
  text-align: right;
}

.mode-nav {
  --drag-lens-height: 86px;
  position: relative;
  z-index: 1;
  width: min(100%, 340px);
  display: flex;
  gap: 0;
  padding: 5px 7px;
  border: 0.5px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  isolation: isolate;
  touch-action: pan-y;
  user-select: none;
  -webkit-touch-callout: none;
  box-shadow:
    inset 0 0 1px 0.5px var(--glass-inset),
    0 18px 48px var(--glass-shadow);
}

.mode-nav.is-mode-dragging {
  overflow: visible;
  cursor: grabbing;
}

.mode-scene { width: 100%; margin: 34px 0 30px; }

.mode-slider {
  position: absolute;
  z-index: 0;
  top: 5px;
  bottom: 5px;
  left: 7px;
  width: calc(33.333% - 4.667px);
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background-color: var(--glass-bg);
  box-shadow: inset 0 0 1px 0.5px var(--glass-inset);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  pointer-events: none;
  transform-origin: left center;
  will-change: left, width, transform;
  backface-visibility: hidden;
}

.mode-nav.is-mode-dragging .mode-slider {
  opacity: 0 !important;
  visibility: hidden;
}

.mode-nav.is-mode-dragging .mode-btn:active { transform: none; }

.mode-nav.is-mode-dragging .mode-btn.active:not(.gesture-target) {
  color: inherit;
}

.mode-nav.is-mode-dragging .mode-btn.gesture-target {
  color: var(--accent-deep);
}

.mobile-bottom-nav.is-mode-dragging .mobile-nav-btn.active:not(.gesture-target) {
  color: var(--ink-faint);
}

.drag-glass-lens {
  position: fixed;
  z-index: 140;
  overflow: hidden;
  contain: paint;
  border: 0;
  border-radius: 999px;
  -webkit-mask-image: -webkit-radial-gradient(white, black);
  mask-image: linear-gradient(#fff, #fff);
  background-color: color-mix(in srgb, var(--glass-bg) 28%, transparent);
  box-shadow: 0 13px 30px color-mix(in srgb, var(--glass-shadow) 90%, transparent);
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(0.65px) saturate(128%) contrast(106%);
  -webkit-backdrop-filter: blur(0.65px) saturate(128%) contrast(106%);
  transition: opacity 100ms ease;
  will-change: left, top;
  backface-visibility: hidden;
}

.drag-glass-lens.is-visible {
  opacity: 1;
}

.mode-btn {
  position: relative;
  z-index: 1;
  flex: 1 1 0;
  min-width: 0;
  min-height: 54px;
  padding: 5px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  text-align: center;
  cursor: pointer;
  transition:
    color 240ms ease,
    transform 240ms var(--ease-out);
}

.mode-btn:hover { transform: translateY(-2px); }
.mode-btn:active { transform: translateY(1px) scale(0.96); }
.mode-btn.active {
  color: var(--accent-deep);
}

.mode-btn svg {
  width: 23px;
  height: 23px;
  stroke-width: 1.7;
  transition: transform 420ms var(--ease-out), stroke-width 220ms ease;
}

.mode-btn.active svg { transform: translateY(-1px) scale(1.12); stroke-width: 2; }

.mode-btn span { font-size: 12px; font-weight: 720; letter-spacing: 0.025em; }

@media (prefers-reduced-motion: reduce) {
  .mode-slider,
  .mode-btn,
  .mode-btn svg,
  .preset-slider,
  .chip-btn { transition-duration: 1ms; }
}

.duration-control { margin-bottom: 18px; }
.custom-range {
  width: 100%;
  height: 20px;
  margin: 0;
  border: 0;
  outline: 0;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.custom-range::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 3px;
  background: var(--line-strong);
}

.custom-range::-moz-range-track {
  height: 3px;
  border-radius: 3px;
  background: var(--line-strong);
}

.custom-range::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  margin-top: -7px;
  border: 4px solid var(--paper-solid);
  border-radius: 50%;
  background: var(--accent-deep);
  box-shadow: 0 2px 8px var(--glass-shadow);
  appearance: none;
  -webkit-appearance: none;
}

.custom-range::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border: 4px solid var(--paper-solid);
  border-radius: 50%;
  background: var(--accent-deep);
  box-shadow: 0 2px 8px var(--glass-shadow);
}

.range-ends { display: flex; justify-content: space-between; color: var(--ink-faint); font-size: 10px; }
.preset-chips {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--glass-bg);
  overflow: hidden;
  box-shadow: inset 0 0 1px 0.5px var(--glass-inset), 0 5px 16px var(--glass-shadow);
  isolation: isolate;
}

.preset-slider {
  position: absolute;
  z-index: 0;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc(16.667% - 3.5px);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background-color: var(--glass-bg);
  box-shadow:
    inset 0 0 1px 0.5px var(--glass-inset),
    0 5px 14px var(--glass-shadow);
  pointer-events: none;
  transform-origin: left center;
  transition: opacity 160ms ease;
  will-change: left, width, transform;
  backface-visibility: hidden;
}

.chip-btn {
  position: relative;
  z-index: 1;
  min-width: 0;
  padding: 7px 3px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 650;
  cursor: pointer;
  transition: color 160ms ease, transform 160ms ease;
}

.chip-btn:hover { color: var(--ink); transform: translateY(-1px); }
.chip-btn:active { transform: translateY(1px) scale(0.94); }
.chip-btn.active { color: var(--accent-deep); }

.today-section {
  padding: 30px clamp(30px, 3.4vw, 48px) 34px;
  border-top: 1px solid var(--line);
  background-color: var(--glass-bg);
}

.section-title-row.compact { align-items: center; }
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 24px; }

.stat-item {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background-color: var(--glass-bg);
  overflow: hidden;
}

.stat-item strong {
  display: block;
  font-family: "Iowan Old Style", Georgia, serif;
  font-size: 30px;
  font-weight: 500;
  line-height: 1;
}

.stat-item span { display: block; margin-top: 6px; color: var(--ink-soft); font-size: 11px; }
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  padding: 20px;
  display: grid;
  place-items: center;
  background: var(--modal-backdrop);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity 220ms ease;
}

.modal-overlay[hidden] { display: none; }
.modal-overlay.open { opacity: 1; }

.modal-card {
  width: min(460px, 100%);
  max-height: min(720px, calc(100dvh - 40px));
  overflow-y: auto;
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background-color: var(--paper-solid);
  box-shadow: 0 32px 100px rgba(0, 0, 0, 0.28);
  transform: translateY(14px) scale(0.98);
  transition: transform 260ms var(--ease-out);
}

.modal-overlay.open .modal-card { transform: translateY(0) scale(1); }
.modal-header { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.setting-group { margin: 28px 0; padding: 0 18px; border: 1px solid var(--line); border-radius: 20px; background-color: var(--glass-bg); }
.setting-row { padding: 16px 0; }
.setting-row + .setting-row { border-top: 1px solid var(--line); }
.setting-row label { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 10px; font-size: 13px; font-weight: 650; }
.setting-row output { color: var(--ink-soft); font-size: 12px; font-weight: 500; }
.toggle-list { border: 1px solid var(--line); border-radius: 20px; overflow: hidden; background-color: var(--glass-bg); }

.toggle-row {
  min-height: 68px;
  padding: 13px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.toggle-row + .toggle-row { border-top: 1px solid var(--line); }
.toggle-row > span:first-child { min-width: 0; flex: 1; }
.toggle-row strong { display: block; font-size: 13px; }
.toggle-row input { position: absolute; width: 1px; height: 1px; opacity: 0; }

.toggle-ui {
  position: relative;
  flex: 0 0 auto;
  width: 40px;
  height: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-quiet);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.toggle-ui::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-faint);
  transition: transform 180ms ease, background-color 180ms ease;
}

.toggle-row input:checked + .toggle-ui { border-color: var(--accent); background: var(--accent-soft); }
.toggle-row input:checked + .toggle-ui::after { transform: translateX(16px); background: var(--accent-deep); }
.toggle-row input:focus-visible + .toggle-ui { outline: 2px solid var(--accent-deep); outline-offset: 3px; }

.text-btn {
  width: 100%;
  margin-top: 18px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 14px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12px;
  cursor: pointer;
}

.text-btn:hover { background: var(--surface-quiet); color: var(--ink); }
.text-btn svg { width: 15px; height: 15px; }

.mobile-bottom-nav { display: none; }

@media (max-width: 920px) {
  .page-shell { width: min(720px, calc(100% - 32px)); }
  .focus-board { min-height: 0; grid-template-columns: 1fr; }
  .timer-panel { min-height: 610px; border-right: 0; border-bottom: 1px solid var(--line); }
  .timer-panel::after { display: none; }
  .rhythm-panel { grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr); grid-template-rows: auto; }
  .today-section { border-top: 0; border-left: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .page-shell {
    width: calc(100% - 24px);
    padding-top: max(14px, env(safe-area-inset-top));
    gap: 12px;
  }

  .site-header { min-height: 44px; }
  .brand { gap: 9px; }
  .brand strong { font-size: 15px; }
  .brand-mark { width: 11px; height: 11px; }
  .header-actions { gap: 5px; }
  .icon-scene, .close-scene { width: 40px; height: 40px; }
  .icon-btn { width: 38px; height: 38px; }
  .liquid-btn svg { width: 17px; height: 17px; }

  .focus-board { border-radius: 25px; }
  .timer-panel { min-height: auto; padding: 22px 18px 26px; }
  .timer-stage { min-height: 300px; padding: 10px 0; }
  .timer-orbit { width: min(78vw, 310px); }
  .time-digits { font-size: clamp(62px, 19vw, 78px); }
  .control-row { gap: 8px; }
  .secondary-scene { width: 56px; }
  .secondary-btn { width: 52px; height: 48px; }
  .play-scene { width: min(46vw, 168px); }
  .play-btn { width: min(44vw, 160px); height: 62px; }

  .rhythm-panel { display: block; }
  .mode-section { padding: 26px 20px 28px; }
  .mode-scene { margin: 24px 0; }
  .mode-nav { --drag-lens-height: 83px; gap: 0; }
  .mode-btn { min-height: 52px; padding: 5px 6px; align-items: center; text-align: center; }
  .mode-btn:hover { transform: none; }
  .preset-chips { gap: 4px; }
  .chip-btn { font-size: 10px; }
  .today-section { padding: 24px 20px 26px; border-top: 1px solid var(--line); border-left: 0; }
}

@media (orientation: landscape) and (max-height: 560px) {
  body { overflow-y: auto; }
  .page-shell {
    width: calc(100% - 28px);
    min-height: 100dvh;
    padding: max(10px, env(safe-area-inset-top)) 0 max(10px, env(safe-area-inset-bottom));
    gap: 8px;
  }

  .site-header { min-height: 38px; }
  .icon-scene { width: 38px; height: 38px; }
  .icon-btn { width: 36px; height: 36px; }

  .focus-board {
    min-height: max(300px, calc(100dvh - 74px));
    grid-template-columns: minmax(310px, 1.08fr) minmax(360px, 0.92fr);
    border-radius: 24px;
  }

  .timer-panel {
    min-height: 0;
    padding: 18px 24px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .timer-stage { min-height: 0; padding: 2px 0; }
  .timer-orbit { width: min(43vh, 206px); }
  .timer-orbit::before { inset: 17px; }
  .time-digits { margin: 5px 0; font-size: clamp(48px, 10vh, 64px); }
  .timer-mode-label { font-size: 10px; }
  .control-row { gap: 7px; }
  .secondary-scene { width: 52px; height: 44px; }
  .secondary-btn { width: 48px; height: 40px; }
  .play-scene { width: 142px; height: 50px; }
  .play-btn { width: 136px; height: 46px; }

  .rhythm-panel { grid-template-columns: 1fr 150px; grid-template-rows: auto; }
  .mode-section { padding: 18px 22px; }
  .section-title-row h2 { font-size: 16px; }
  .duration-readout { font-size: 17px; }
  .mode-scene { margin: 14px 0 12px; }
  .mode-nav { --drag-lens-height: 77px; gap: 0; padding: 5px; border-radius: 999px; }
  .mode-slider { top: 5px; bottom: 5px; left: 5px; }
  .mode-btn { min-height: 48px; padding: 4px 5px; gap: 2px; border-radius: 999px; align-items: center; text-align: center; }
  .mode-btn svg { width: 21px; height: 21px; }
  .mode-btn span { font-size: 11px; }
  .mode-btn:hover { transform: none; }
  .duration-control { margin-bottom: 8px; }
  .custom-range { height: 15px; }
  .range-ends { display: none; }
  .chip-btn { padding: 4px 2px; font-size: 9px; }
  .today-section { padding: 18px 14px; border-top: 0; border-left: 1px solid var(--line); }
  .today-section .section-title-row { display: block; }
  .today-section .section-title-row svg { display: none; }
  .today-section h2 { font-size: 14px; }
  .stats-grid { grid-template-columns: 1fr; gap: 6px; margin-top: 12px; }
  .stat-item { padding: 9px; border-radius: 12px; }
  .stat-item strong { font-size: 23px; }
  .stat-item span { margin-top: 3px; font-size: 9px; }
}

@media (orientation: landscape) and (max-height: 430px) and (max-width: 720px) {
  .focus-board { grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr); }
  .timer-panel { padding-inline: 18px; }
  .rhythm-panel { display: block; }
  .today-section { display: none; }
}

@media (max-width: 640px) {
  body { padding-bottom: 0; }

  .focus-board .mode-nav { touch-action: none; }

  .page-shell {
    min-height: 100dvh;
    padding-bottom: 0;
  }

  #btn-settings { display: none; }
  .header-actions .icon-scene:has(#btn-settings) { display: none; }
  .modal-header .close-scene { display: none; }

  .focus-board {
    min-height: calc(100dvh - 70px);
    display: block;
    overflow: hidden;
  }

  .focus-board[data-mobile-view="timer"] .today-section,
  .focus-board[data-mobile-view="stats"] .timer-panel,
  .focus-board[data-mobile-view="stats"] .mode-section {
    display: none;
  }

  .focus-board[data-mobile-view="timer"] .timer-panel {
    min-height: calc(100dvh - 70px);
    padding-bottom: calc(104px + env(safe-area-inset-bottom));
    border: 0;
  }

  .focus-board[data-mobile-view="timer"] .rhythm-panel,
  .focus-board[data-mobile-view="stats"] .rhythm-panel {
    display: block;
    background: transparent;
  }

  .focus-board[data-mobile-view="stats"] .today-section {
    min-height: calc(100dvh - 70px);
    padding-bottom: calc(112px + env(safe-area-inset-bottom));
  }

  .focus-board[data-mobile-view="timer"] .mode-section {
    display: block;
    padding: 30px 22px calc(112px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
  }

  .focus-board[data-mobile-view="stats"] .today-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 30px 22px calc(112px + env(safe-area-inset-bottom));
    border: 0;
    background: transparent;
  }

  .focus-board[data-mobile-view="stats"] .stats-grid { gap: 12px; }
  .focus-board[data-mobile-view="stats"] .stat-item { padding: 22px 18px; }
  .focus-board[data-mobile-view="stats"] .stat-item strong { font-size: 38px; }

  .mobile-bottom-nav {
    --drag-lens-height: 77px;
    position: fixed;
    z-index: 110;
    right: max(12px, env(safe-area-inset-right));
    bottom: max(10px, env(safe-area-inset-bottom));
    left: max(12px, env(safe-area-inset-left));
    width: auto;
    height: 60px;
    padding: 5px 7px;
    display: flex;
    gap: 0;
    touch-action: none;
    border: 0.5px solid var(--line);
    border-radius: 999px;
    background-color: var(--glass-bg);
    box-shadow: inset 0 0 1px 0.5px var(--glass-inset), 0 16px 48px var(--glass-shadow);
  }

  .mobile-nav-slider {
    top: 5px;
    bottom: 5px;
    left: 7px;
    width: calc(33.333% - 4.667px);
  }

  .mobile-nav-btn {
    flex: 1 1 0;
    min-width: 0;
    min-height: 48px;
    padding: 4px;
    gap: 3px;
    color: var(--ink-faint);
  }

  .mobile-nav-btn.active { color: var(--accent-deep); }
  .mobile-nav-btn svg { width: 20px; height: 20px; stroke-width: 1.8; }
  .mobile-nav-btn span { font-size: 10px; font-weight: 700; letter-spacing: 0.025em; }

  .modal-overlay {
    inset: 0;
    padding: max(22px, env(safe-area-inset-top)) 20px calc(110px + env(safe-area-inset-bottom));
    align-items: start;
    overflow-y: auto;
    background: var(--paper);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .modal-card {
    width: min(100%, 460px);
    max-height: none;
    overflow: visible;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transform: none;
  }

  .modal-overlay.open .modal-card { transform: none; }
}

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