:root {
  --bg: #101014;
  --surface: #1a1a21;
  --surface-2: #25252e;
  --text: #f4f4f6;
  --muted: #9a9aa8;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --on-accent: #121216;

  --focus: #ff6b5b;
  --short: #2fd6a8;
  --long: #72a8ff;
  --danger: #ff6b6b;

  --accent: var(--focus);
  --radius: 20px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f4f1;
    --surface: #ffffff;
    --surface-2: #ebe8e3;
    --text: #1b1b20;
    --muted: #6d6d78;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 20px 50px rgba(40, 30, 20, 0.14);
    --on-accent: #ffffff;
    --focus: #e8503f;
    --short: #0f9c78;
    --long: #3a76dc;
    --danger: #d93b3b;
    color-scheme: light;
  }
}

:root[data-theme="light"] {
  --bg: #f6f4f1;
  --surface: #ffffff;
  --surface-2: #ebe8e3;
  --text: #1b1b20;
  --muted: #6d6d78;
  --border: rgba(0, 0, 0, 0.08);
  --shadow: 0 20px 50px rgba(40, 30, 20, 0.14);
  --on-accent: #ffffff;
  --focus: #e8503f;
  --short: #0f9c78;
  --long: #3a76dc;
  --danger: #d93b3b;
  color-scheme: light;
}

body[data-mode="short"] { --accent: var(--short); }
body[data-mode="long"] { --accent: var(--long); }

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 60% at 50% -10%, color-mix(in srgb, var(--accent) 26%, transparent), transparent 70%),
    radial-gradient(80% 50% at 50% 110%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%);
  transition: background 0.6s ease;
  z-index: 0;
}

button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; padding: 0; }
svg { display: block; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Layout ---------- */
.app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  padding:
    calc(env(safe-area-inset-top) + 12px)
    calc(env(safe-area-inset-right) + 16px)
    calc(env(safe-area-inset-bottom) + 16px)
    calc(env(safe-area-inset-left) + 16px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.topbar-actions { display: flex; gap: 4px; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: var(--muted);
  transition: background 0.2s, color 0.2s;
}
.icon-btn svg { width: 22px; height: 22px; }
.icon-btn:hover, .icon-btn:focus-visible { background: var(--surface-2); color: var(--text); outline: none; }

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 3.2vh, 28px);
  padding: 12px 0 20px;
}

/* ---------- Mode switch ---------- */
.modes {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  padding: 4px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.modes button {
  position: relative;
  z-index: 1;
  padding: 10px 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  border-radius: 12px;
  transition: color 0.3s;
  white-space: nowrap;
}
.modes button[aria-selected="true"] { color: var(--on-accent); }
.modes-pill {
  position: absolute;
  top: 4px; bottom: 4px; left: 4px;
  width: calc((100% - 8px) / 3);
  border-radius: 12px;
  background: var(--accent);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: transform 0.35s cubic-bezier(.3,.7,.2,1), background 0.4s;
}
body[data-mode="short"] .modes-pill { transform: translateX(100%); }
body[data-mode="long"] .modes-pill { transform: translateX(200%); }

/* ---------- Dial ---------- */
.dial {
  position: relative;
  width: min(80vw, 46vh, 340px);
  aspect-ratio: 1;
}
.ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 9; }
.ring-track { stroke: var(--surface-2); }
.ring-progress {
  stroke: var(--accent);
  stroke-linecap: round;
  transition: stroke 0.4s, stroke-dashoffset 0.25s linear;
  filter: drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 55%, transparent));
}
.dial-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  text-align: center;
}
.dial-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.4s;
}
.time {
  font-size: clamp(56px, 18vw, 84px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.dial-sub { font-size: 14px; color: var(--muted); }

body.running .time { animation: none; }
body.paused .time { animation: blink 1.6s ease-in-out infinite; }
@keyframes blink { 50% { opacity: 0.45; } }

/* ---------- Cycle dots ---------- */
.cycle { display: flex; gap: 10px; min-height: 12px; }
.cycle span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--surface-2);
  transition: background 0.3s, transform 0.3s;
}
.cycle span.done { background: var(--focus); }
.cycle span.current { box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px color-mix(in srgb, var(--focus) 60%, transparent); }

/* ---------- Task ---------- */
.task { width: 100%; }
.task input {
  width: 100%;
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  text-align: center;
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.task input::placeholder { color: var(--muted); }
.task input:focus {
  border-color: color-mix(in srgb, var(--accent) 60%, transparent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}

/* ---------- Controls ---------- */
.controls { display: flex; align-items: center; gap: 28px; }
.ctrl {
  display: grid;
  place-items: center;
  border-radius: 50%;
  transition: transform 0.15s, background 0.3s, box-shadow 0.3s;
}
.ctrl:active { transform: scale(0.92); }
.ctrl-sm {
  width: 56px; height: 56px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}
.ctrl-sm svg { width: 22px; height: 22px; }
.ctrl-main {
  width: 84px; height: 84px;
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: 0 12px 34px color-mix(in srgb, var(--accent) 45%, transparent);
}
.ctrl-main svg { width: 34px; height: 34px; }
.ctrl:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 3px; }

/* ---------- Today footer ---------- */
.today {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  border: 1px solid var(--border);
  cursor: pointer;
}
.today-row { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; font-size: 14px; }
.today-title { font-weight: 700; }
.today-value { color: var(--muted); }
.today-value strong { color: var(--text); }
.bar { height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar span {
  display: block; height: 100%; width: 0;
  border-radius: inherit;
  background: var(--focus);
  transition: width 0.5s ease;
}

/* ---------- Sheets ---------- */
.sheet {
  width: 100%;
  max-width: 520px;
  max-height: 88dvh;
  margin: auto auto 0;
  padding: 0;
  border: 0;
  border-radius: 28px 28px 0 0;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.sheet[open] { display: flex; animation: sheet-in 0.32s cubic-bezier(.2,.8,.2,1); }
.sheet::backdrop { background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(3px); animation: fade-in 0.3s; }
@keyframes sheet-in { from { transform: translateY(100%); } }
@keyframes fade-in { from { opacity: 0; } }
@media (min-width: 560px) {
  .sheet { margin: auto; border-radius: 28px; }
}

.sheet-inner {
  flex: 1;
  overflow-y: auto;
  padding: 8px 20px calc(env(safe-area-inset-bottom) + 24px);
}
.sheet-inner::before {
  content: "";
  display: block;
  width: 40px; height: 5px;
  margin: 4px auto 6px;
  border-radius: 99px;
  background: var(--surface-2);
}
.sheet-head {
  position: sticky;
  top: -8px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0 8px;
  background: var(--surface);
}
.sheet-head h2 { margin: 0; font-size: 22px; letter-spacing: -0.01em; }

.group-title {
  margin: 20px 4px 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.group {
  border-radius: 18px;
  background: var(--surface-2);
  overflow: hidden;
}
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
  padding: 10px 14px 10px 16px;
  font-size: 15px;
}
.row + .row { border-top: 1px solid var(--border); }
.row > span { display: flex; flex-direction: column; }
.row small { color: var(--muted); font-size: 12px; margin-top: 2px; }

.stepper {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border-radius: 12px;
  background: var(--surface);
}
.stepper button {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border-radius: 9px;
  color: var(--text);
}
.stepper button:active { background: var(--surface-2); }
.stepper button svg { width: 16px; height: 16px; }
.stepper output {
  min-width: 32px;
  text-align: center;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.switch {
  appearance: none;
  flex-shrink: 0;
  position: relative;
  width: 50px; height: 30px;
  margin: 0;
  border-radius: 99px;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.25s;
}
.switch::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 0.25s cubic-bezier(.3,.7,.2,1), background 0.25s;
}
.switch:checked { background: var(--accent); border-color: transparent; }
.switch:checked::after { transform: translateX(20px); background: #fff; }
.switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.range { width: 45%; accent-color: var(--accent); }

.chip {
  padding: 8px 14px;
  border-radius: 99px;
  background: var(--surface);
  font-size: 14px;
  font-weight: 600;
}

.segmented {
  display: flex;
  padding: 3px;
  border-radius: 12px;
  background: var(--surface);
}
.segmented button {
  padding: 7px 12px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}
.segmented button.active { background: var(--accent); color: var(--on-accent); }

.link-btn {
  display: block;
  margin: 22px auto 4px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}
.link-btn.danger { color: var(--danger); }

/* ---------- Stats ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 8px;
}
.tile {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  border-radius: 18px;
  background: var(--surface-2);
}
.tile-value { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.tile-label { font-size: 13px; color: var(--muted); }

.chart {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  height: 150px;
  padding: 14px 12px 10px;
  border-radius: 18px;
  background: var(--surface-2);
}
.chart-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  min-width: 0;
}
.chart-val { font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; }
.chart-bar {
  width: 100%;
  max-width: 28px;
  min-height: 4px;
  border-radius: 6px 6px 3px 3px;
  background: color-mix(in srgb, var(--focus) 45%, var(--surface));
  transition: height 0.5s ease;
}
.chart-col.is-today .chart-bar { background: var(--focus); }
.chart-col.is-empty .chart-bar { background: var(--surface); }
.chart-day { font-size: 12px; color: var(--muted); }
.chart-col.is-today .chart-day { color: var(--text); font-weight: 700; }

.log { list-style: none; margin: 0; padding: 0; border-radius: 18px; background: var(--surface-2); overflow: hidden; }
.log li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  font-size: 15px;
}
.log li + li { border-top: 1px solid var(--border); }
.log .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--focus); flex-shrink: 0; }
.log .log-task { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.log .log-meta { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.log .empty { color: var(--muted); justify-content: center; }

/* ---------- Info ---------- */
.steps { margin: 8px 0 0; padding: 0; list-style: none; counter-reset: s; }
.steps li {
  position: relative;
  padding: 12px 0 12px 44px;
  line-height: 1.5;
  font-size: 15px;
  color: var(--muted);
  counter-increment: s;
}
.steps li strong { color: var(--text); }
.steps li::before {
  content: counter(s);
  position: absolute;
  left: 0; top: 11px;
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--focus) 18%, transparent);
  color: var(--focus);
  font-weight: 700;
  font-size: 14px;
}
.tip {
  margin-top: 8px;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--surface-2);
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
}
.tip strong { color: var(--text); }
.keys { list-style: none; margin: 0; padding: 0; border-radius: 18px; background: var(--surface-2); }
.keys li { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; font-size: 14px; }
.keys li + li { border-top: 1px solid var(--border); }
kbd {
  padding: 3px 8px;
  border-radius: 7px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
}

/* ---------- Confirm ---------- */
.sheet-confirm h2 { margin: 6px 0 8px; font-size: 20px; }
.sheet-confirm p { margin: 0 0 20px; color: var(--muted); font-size: 15px; line-height: 1.5; }
.confirm-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.btn {
  padding: 14px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 700;
}
.btn-ghost { background: var(--surface-2); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary.danger { background: var(--danger); color: #fff; }
.btn:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 2px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  top: calc(env(safe-area-inset-top) + 68px);
  z-index: 50;
  max-width: calc(100% - 32px);
  padding: 12px 18px;
  border-radius: 14px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translate(-50%, -12px);
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Small / short screens ---------- */
@media (max-height: 640px) {
  .main { gap: 12px; }
  .ctrl-main { width: 72px; height: 72px; }
  .ctrl-sm { width: 50px; height: 50px; }
  .task input { padding: 11px 16px; }
}
@media (max-width: 360px) {
  .modes button { font-size: 12.5px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}