/* Hallmark · redesign · macrostructure: (既存維持) · tone: utilitarian/technical · anchor hue: green */
/* Hallmark · pre-emit critique: P5 H4 E5 S4 R5 V4 */

:root {
  color-scheme: dark;

  /* Type */
  --font-sans: system-ui, sans-serif;
  --font-numeric: system-ui, sans-serif;

  /* Paper & surfaces — green-anchored dark */
  --color-paper: #10251f;
  --color-paper-lift: #1e4e40;
  --surface-card: #16342cdd;
  --surface-sunken: #0e251e80;
  --surface-chart: #0e251ecc;
  --surface-group: #10292080;
  --surface-toast: #16342cf2;
  --surface-input: #0e251e;
  --surface-button: #234d40;
  --surface-toggle: #0b211b;
  --surface-toggle-on: #397456;
  --surface-chip-on: #315e4d;
  --surface-resume: #285a45;

  /* Ink */
  --color-ink: #ecf4ee;
  --color-ink-bright: #effff3;
  --color-ink-soft: #c9dbd0;
  --color-ink-muted: #a8c6b3;
  --color-ink-muted-cool: #b7c8be;
  --color-ink-dim: #8eae9b;
  --color-ink-on-accent: #123222;

  /* Accent — signature green */
  --color-accent: #9be0ad;
  --color-accent-strong: #baf6c8;
  --color-accent-soft: #99e2ac;
  --color-accent-dim: #a9ebbb;
  --color-accent-mint: #b9e6c9;

  /* Warn — amber */
  --color-warn: #ffd69a;
  --color-warn-soft: #ffe0a8;
  --color-warn-text: #ffe8c4;
  --color-warn-border: #a98452;
  --color-warn-bg: #49381f;

  /* Danger — coral */
  --color-danger: #ffb39f;

  /* Borders */
  --color-border: #376554;
  --color-border-strong: #548c73;
  --color-border-hover: #79ba97;
  --color-border-divider: #315647;
  --color-border-focus: #d8f8df;

  /* Shadows */
  --shadow-card: 0 1rem 2rem #06140f44;
  --shadow-toast: 0 .6rem 1.6rem #06140f88;

  /* Radius */
  --radius-xs: .55rem;
  --radius-sm: .7rem;
  --radius-md: .75rem;
  --radius-lg: .85rem;
  --radius-xl: .9rem;
  --radius-2xl: 1.25rem;
  --radius-pill: 999px;

  /* Space */
  --space-3xs: .15rem;
  --space-2xs: .25rem;
  --space-xs: .35rem;
  --space-sm: .5rem;
  --space-md: .75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;
  --space-2xl: 2rem;
  --space-3xl: 3rem;

  /* Motion */
  --dur-quick: .18s;
  --ease-standard: cubic-bezier(.4, 0, .2, 1);

  font-family: var(--font-sans);
  background: var(--color-paper);
  color: var(--color-ink);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  overflow-x: clip;
  background: radial-gradient(circle at top, var(--color-paper-lift), var(--color-paper) 45rem);
}

main {
  max-width: 560px;
  min-height: 100vh;
  margin: auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
}

header { margin-bottom: 1.25rem; }
header p {
  margin: 0;
  color: var(--color-accent-dim);
  font-size: .7rem;
  letter-spacing: .16em;
}

h1 {
  margin: var(--space-2xs) 0;
  font-size: 2.4rem;
}

h2 {
  margin: 0;
  font-size: 1rem;
}

#connection {
  color: var(--color-ink-muted-cool);
  font-size: .85rem;
}

#connection.connected { color: var(--color-accent-soft); }

.card {
  margin: var(--space-lg) 0;
  padding: 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  background: var(--surface-card);
  box-shadow: var(--shadow-card);
}

.hero {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: var(--space-md);
}

.metric {
  min-width: 0;
  padding: .8rem;
  border-radius: var(--radius-lg);
  background: var(--surface-sunken);
}

.label abbr {
  text-decoration: none;
}

.metric-status {
  display: block;
  min-height: 1.1rem;
  margin-top: .2rem;
  color: var(--color-ink-muted);
  font-size: .72rem;
  line-height: 1.2;
}

.metric-status[data-level="low"],
.metric-status[data-level="moderate"] { color: var(--color-accent-soft); }
.metric-status[data-level="warm"] { color: var(--color-warn-soft); }
.metric-status[data-level="hot"],
.metric-status[data-level="very-hot"] { color: var(--color-danger); }

.label,
.section-heading span {
  display: block;
  color: var(--color-ink-muted);
  font-size: .76rem;
}

strong {
  display: block;
  margin-top: var(--space-2xs);
  font-size: 1.7rem;
  letter-spacing: -.06em;
  font-variant-numeric: tabular-nums;
}

strong small {
  margin-left: .1rem;
  color: var(--color-accent-mint);
  font-size: .72rem;
  letter-spacing: 0;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.modes,
.feedback {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm);
}

.feedback { margin-bottom: .6rem; }

button,
input,
select { font: inherit; }

button {
  min-height: 2.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface-button);
  color: inherit;
  cursor: pointer;
}

button:hover { border-color: var(--color-border-hover); }

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: 3px;
}

button:disabled {
  cursor: wait;
  opacity: .62;
}

button.active,
.feedback button.active {
  border-color: var(--color-accent-strong);
  background: var(--color-accent);
  color: var(--color-ink-on-accent);
  font-weight: 700;
}

.mode-control {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.control-label {
  display: block;
  color: var(--color-ink-muted);
  font-size: .72rem;
}

.control-status {
  display: block;
  margin-top: var(--space-3xs);
  color: var(--color-ink-soft);
  font-size: .9rem;
  font-weight: 650;
}

.control-status.running { color: var(--color-accent-soft); }
.control-status.paused { color: var(--color-warn); }

.pause {
  width: 100%;
  min-height: 3rem;
  border-color: var(--color-warn-border);
  background: var(--color-warn-bg);
  color: var(--color-warn-text);
  font-weight: 650;
}

.pause-actions {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: var(--space-sm);
}

.pause-actions select { min-height: 3rem; }
.pause-actions select[hidden] { display: none; }
.pause-actions:has(select[hidden]) { grid-template-columns: 1fr; }

.pause[data-state="paused"] {
  border-color: var(--color-accent);
  background: var(--surface-resume);
  color: var(--color-ink-bright);
}

#offset-caption {
  color: var(--color-ink-muted);
  font-size: .76rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.text-button {
  min-height: 2.75rem;
  padding: .2rem;
  border: 0;
  background: none;
  color: var(--color-accent-dim);
}

#chart {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  background: var(--surface-chart);
}

#chart-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-linecap: round;
  stroke-width: 3;
}

#chart-line[data-metric="di"] { stroke: var(--color-warn); }

.history-heading {
  align-items: flex-end;
  margin-bottom: .55rem;
}

#history-caption { font-variant-numeric: tabular-nums; }

.chart-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
  margin-bottom: .65rem;
}

.chart-controls button {
  min-height: 2.75rem;
}

.chart-controls button[aria-pressed="true"] {
  border-color: var(--color-accent-strong);
  background: var(--surface-chip-on);
  color: var(--color-ink-bright);
  font-weight: 700;
}

.chart-axis {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-2xs);
  color: var(--color-ink-dim);
  font-size: .68rem;
  font-variant-numeric: tabular-nums;
}

.metric-note {
  margin: .8rem 0 0;
  color: var(--color-ink-muted);
  font-size: .74rem;
  line-height: 1.55;
}

label {
  display: grid;
  gap: var(--space-xs);
  color: var(--color-ink-soft);
  font-size: .82rem;
}

input,
select {
  min-height: 2.75rem;
  padding: .45rem .6rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-xs);
  background: var(--surface-input);
  color: inherit;
}

input[type="time"],
input[type="number"] { font-variant-numeric: tabular-nums; }

.settings {
  display: grid;
  gap: var(--space-lg);
}

.settings-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
}

.settings-heading p {
  max-width: 24rem;
  margin: var(--space-xs) 0 0;
  color: var(--color-ink-muted);
  font-size: .8rem;
  line-height: 1.5;
}

.settings-status {
  flex: 0 0 auto;
  padding: .25rem .55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted-cool);
  font-size: .72rem;
}

.settings-status.dirty {
  border-color: var(--color-warn-border);
  color: var(--color-warn);
}

.settings-status.saved {
  border-color: var(--color-border-strong);
  color: var(--color-accent-soft);
}

.settings-group {
  min-width: 0;
  margin: 0;
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--surface-group);
}

.settings-group legend {
  padding: 0 var(--space-xs);
  color: var(--color-ink);
  font-size: .88rem;
  font-weight: 700;
}

.group-help {
  margin: 0 0 .85rem;
  color: var(--color-ink-muted);
  font-size: .76rem;
  line-height: 1.45;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .8rem;
}

.settings-grid .full-width { grid-column: 1 / -1; }

.toggle-list {
  display: grid;
  grid-auto-rows: 1fr;
  gap: var(--space-2xs);
}

label.toggle {
  display: flex;
  min-height: 4.25rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: .6rem 0;
  border-bottom: 1px solid var(--color-border-divider);
  cursor: pointer;
}

label.toggle:last-child { border-bottom: 0; }

.toggle-copy { min-width: 0; }

.toggle-title {
  display: block;
  color: var(--color-ink);
  font-size: .86rem;
  font-weight: 650;
}

.toggle-hint {
  display: block;
  margin-top: var(--space-3xs);
  color: var(--color-ink-muted);
  font-size: .72rem;
  line-height: 1.35;
}

label.toggle input {
  position: relative;
  flex: 0 0 auto;
  width: 3rem;
  min-height: 1.75rem;
  height: 1.75rem;
  margin: 0;
  padding: 0;
  appearance: none;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface-toggle);
  cursor: pointer;
  transition: background-color var(--dur-quick) var(--ease-standard), border-color var(--dur-quick) var(--ease-standard);
}

label.toggle input::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--color-ink-muted-cool);
  transition: transform var(--dur-quick) var(--ease-standard), background-color var(--dur-quick) var(--ease-standard);
}

label.toggle input:checked {
  border-color: var(--color-accent);
  background: var(--surface-toggle-on);
}

label.toggle input:checked::after {
  background: var(--color-ink-bright);
  transform: translateX(1.25rem);
}

.primary-button {
  width: 100%;
  min-height: 3.1rem;
  border-color: var(--color-accent-strong);
  background: var(--color-accent);
  color: var(--color-ink-on-accent);
  font-weight: 750;
}

.help-text {
  margin: 0 0 .8rem;
  color: var(--color-ink-muted);
  font-size: .85rem;
  line-height: 1.5;
}

#pairing:not([hidden]) {
  display: grid;
  gap: var(--space-md);
}

#update-toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  z-index: 1000;
  display: flex;
  max-width: 560px;
  margin: auto;
  padding: .75rem 1rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-xl);
  background: var(--surface-toast);
  box-shadow: var(--shadow-toast);
  color: var(--color-ink);
  font-size: .9rem;
}

#update-toast button {
  min-height: 2.4rem;
  padding: 0 1.1rem;
  border: 0;
  background: var(--color-accent);
  color: var(--color-ink-on-accent);
  font-weight: 700;
}

@media (min-width: 480px) {
  .mode-control {
    grid-template-columns: minmax(7rem, auto) 1fr;
    align-items: center;
  }
}

@media (max-width: 360px) {
  main { padding-right: var(--space-md); padding-left: var(--space-md); }
  .card { padding: var(--space-lg); }
  .settings-grid { grid-template-columns: 1fr; }
  .settings-grid .full-width { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  label.toggle input,
  label.toggle input::after { transition: none; }
}