:root {
  color-scheme: light dark;
  --bg: #eef0eb;
  --surface: #f8f7f1;
  --surface-2: #e2e5de;
  --ink: #172127;
  --muted: #5d686c;
  --line: #b9c0bb;
  --amber: #d58a18;
  --amber-ink: #21180b;
  --teal: #236b65;
  --danger: #a34b3f;
  --session-bg: #111a20;
  --session-surface: #18252c;
  --session-ink: #f0eee5;
  --session-muted: #9aabb0;
  --focus: #e59a26;
  font-family: -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--bg); }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
}

button, input { font: inherit; }

button, .file-button {
  min-height: 44px;
  border-radius: 3px;
  cursor: pointer;
}

button:focus-visible, input:focus-visible, .file-button:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

button:disabled { cursor: default; opacity: 0.6; }

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(2rem, 9vw, 4rem); letter-spacing: -0.045em; }
h2 { margin-bottom: 0; font-size: 0.82rem; letter-spacing: 0.08em; text-transform: uppercase; }

.app-shell {
  min-height: 100dvh;
  padding: calc(24px + env(safe-area-inset-top)) calc(18px + env(safe-area-inset-right)) calc(28px + env(safe-area-inset-bottom)) calc(18px + env(safe-area-inset-left));
}

.screen { width: min(100%, 760px); margin: 0 auto; }
.masthead, .session-header, .section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.masthead { margin-bottom: 44px; }
.eyebrow, .label, .status-mark { margin-bottom: 6px; color: var(--muted); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; }
.muted { color: var(--muted); }
.text-button { border: 0; background: transparent; color: var(--ink); font-weight: 700; text-decoration: underline; text-underline-offset: 5px; }

.attention-panel {
  margin-bottom: 48px;
  padding: 22px 0 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.attention-panel p:last-child { margin-bottom: 0; }
.headline-number, .remaining, .station-readout strong, .reward-table dd, .debrief-duration {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-variant-numeric: tabular-nums;
}
.headline-number { margin-bottom: 6px; font-size: clamp(3.4rem, 18vw, 7rem); font-weight: 750; line-height: 0.95; letter-spacing: -0.08em; }

.duration-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 16px 0 12px; }
.duration-chip { min-height: 70px; padding: 9px 7px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); }
.duration-chip span, .duration-chip small { display: block; }
.duration-chip span { font-family: ui-monospace, "SF Mono", monospace; font-size: 1.05rem; font-weight: 700; }
.duration-chip small { margin-top: 4px; color: var(--muted); font-size: 0.68rem; text-transform: uppercase; }
.duration-chip.selected { border-color: var(--amber); background: var(--amber); color: var(--amber-ink); }
.duration-chip.selected small { color: var(--amber-ink); }

.custom-stepper { display: grid; grid-template-columns: 48px 1fr 48px; align-items: center; gap: 8px; margin: 12px 0; }
.custom-stepper button { border: 1px solid var(--line); background: var(--surface); color: var(--ink); font-size: 1.4rem; }
.custom-stepper output { text-align: center; font-family: ui-monospace, "SF Mono", monospace; font-weight: 700; }
.hidden { display: none; }

.primary-button, .secondary-button, .file-button {
  border: 1px solid var(--ink);
  padding: 12px 18px;
  font-weight: 750;
}
.primary-button { width: 100%; background: var(--amber); color: var(--amber-ink); border-color: var(--amber); }
.start-button { min-height: 62px; margin-top: 8px; font-size: 1.05rem; }
.secondary-button, .file-button { background: transparent; color: var(--ink); }

.station-readout { display: grid; grid-template-columns: repeat(3, 1fr); margin: 46px 0 34px; border: 1px solid var(--line); }
.station-readout div { min-width: 0; padding: 15px 10px; border-right: 1px solid var(--line); }
.station-readout div:last-child { border-right: 0; }
.station-readout span, .station-readout strong { display: block; }
.station-readout span { margin-bottom: 5px; color: var(--muted); font-size: 0.64rem; text-transform: uppercase; }
.station-readout strong { overflow: hidden; font-size: clamp(0.9rem, 5vw, 1.3rem); text-overflow: ellipsis; }

.quota { padding-top: 18px; border-top: 1px solid var(--line); }
.pips { display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; margin-top: 14px; }
.pip { height: 8px; border: 1px solid var(--line); background: transparent; }
.pip.filled { border-color: var(--teal); background: var(--teal); }

.view-session { background: var(--session-bg); color: var(--session-ink); }
.session-screen { min-height: calc(100dvh - 52px - env(safe-area-inset-top) - env(safe-area-inset-bottom)); display: flex; flex-direction: column; }
.session-screen .eyebrow { color: var(--session-muted); margin: 0; }
.signal-dot { color: #79b8ad; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; }
.signal-dot::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: #79b8ad; }
.timer-wrap { position: relative; width: min(72vw, 320px); margin: clamp(35px, 8vh, 70px) auto 24px; aspect-ratio: 1; }
.progress-ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.progress-ring circle { fill: none; stroke-width: 3; }
.ring-track { stroke: #2b3940; }
.ring-value { stroke: var(--amber); stroke-linecap: square; transition: stroke-dashoffset 0.25s linear; }
.timer-face { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.remaining { margin-bottom: 4px; color: var(--session-ink); font-size: clamp(3.1rem, 16vw, 5.6rem); font-weight: 650; letter-spacing: -0.08em; line-height: 1; }
.timer-face .label { color: var(--session-muted); }
.session-readout { display: flex; justify-content: center; gap: 22px; color: var(--session-muted); font-family: ui-monospace, "SF Mono", monospace; font-size: 0.78rem; }
.session-readout p { margin: 0; }
#tier-line { color: var(--amber); }
.face-down { margin: auto 0 26px; color: var(--session-muted); text-align: center; }
.session-actions { text-align: center; }
.session-actions .secondary-button { width: 100%; border-color: #42535b; color: var(--session-ink); }
.acknowledgement { min-height: 22px; margin: 8px 0 4px; color: #79b8ad; font-size: 0.8rem; }
.hold-button { position: relative; width: 100%; overflow: hidden; border: 1px solid #34434a; background: transparent; color: var(--session-muted); }
.hold-fill { position: absolute; inset: 0 auto 0 0; width: 0; background: #34434a; }
.hold-label { position: relative; }
.hold-preview { min-height: 20px; margin: 7px 0 0; color: var(--session-muted); font-size: 0.72rem; }
.undo-toast { position: fixed; z-index: 3; right: calc(14px + env(safe-area-inset-right)); bottom: calc(14px + env(safe-area-inset-bottom)); left: calc(14px + env(safe-area-inset-left)); display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 12px; max-width: 520px; margin: auto; padding: 12px 14px; border: 1px solid #4a5b62; background: #202d33; color: var(--session-ink); }
.undo-toast button { border: 0; background: transparent; color: var(--amber); font-weight: 800; text-decoration: underline; }
.toast-time { color: var(--session-muted); font-family: ui-monospace, "SF Mono", monospace; }

.debrief-screen h1 { margin-bottom: 8px; }
.debrief-duration { color: var(--muted); }
.best-banner { margin: 26px 0 14px; padding: 11px 13px; border-left: 4px solid var(--teal); background: var(--surface-2); color: var(--teal); font-weight: 800; text-transform: uppercase; }
.reward-table { margin: 30px 0; border-top: 1px solid var(--line); }
.reward-table div { display: flex; justify-content: space-between; padding: 13px 3px; border-bottom: 1px solid var(--line); }
.reward-table dt { color: var(--muted); }
.reward-table dd { margin: 0; }
.reward-table .reward-total { padding: 18px 3px; color: var(--ink); font-size: 1.12rem; font-weight: 800; }
.debrief-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.debrief-meta p { padding: 15px; background: var(--surface-2); }
.debrief-meta span, .debrief-meta strong { display: block; }
.debrief-meta span { margin-bottom: 6px; color: var(--muted); font-size: 0.74rem; }
.future-bay { margin: 26px 0; padding: 20px; border: 1px dashed var(--line); color: var(--muted); }
.future-bay span { color: var(--ink); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }
.future-bay p { margin: 8px 0 0; }

.chart-panel { margin-bottom: 38px; padding: 16px; border: 1px solid var(--line); }
.sparkline { display: block; width: 100%; height: 130px; margin-top: 18px; border-bottom: 1px solid var(--line); }
.sparkline rect { fill: var(--teal); }
.session-list { padding: 0; list-style: none; border-top: 1px solid var(--line); }
.session-list li { display: grid; grid-template-columns: 1fr auto; gap: 5px 14px; padding: 14px 2px; border-bottom: 1px solid var(--line); }
.session-list li > div { display: flex; gap: 8px; }
.session-list li > div span { color: var(--muted); text-transform: capitalize; }
.session-list li > span { color: var(--muted); font-size: 0.78rem; }
.empty-state { padding: 24px 0; color: var(--muted); }
.settings, .data-tools { margin-top: 45px; padding-top: 22px; border-top: 1px solid var(--line); }
.settings > label { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 68px; border-bottom: 1px solid var(--line); }
.settings label span, .settings label small { display: block; }
.settings label small { margin-top: 4px; color: var(--muted); }
.settings input { width: 24px; height: 24px; accent-color: var(--teal); }
.full-width { width: 100%; margin-top: 16px; }
.data-tools > div { display: flex; gap: 8px; margin-top: 16px; }
.file-button { display: inline-grid; place-items: center; }
.file-button input { position: absolute; width: 1px; height: 1px; clip: rect(0 0 0 0); clip-path: inset(50%); overflow: hidden; white-space: nowrap; }
.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; }

@media (prefers-color-scheme: dark) {
  :root { --bg: #111a20; --surface: #18252c; --surface-2: #202e35; --ink: #f0eee5; --muted: #9aabb0; --line: #3c4a50; --amber: #e39b2e; --amber-ink: #1f1608; --teal: #65aaa0; }
}

@media (min-width: 620px) {
  .app-shell { padding-top: max(48px, env(safe-area-inset-top)); }
  .duration-grid { grid-template-columns: repeat(6, 1fr); }
  .session-screen { max-width: 540px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0s !important; animation-duration: 0s !important; }
}