/*
 * Design tokens for outdoor use.
 *
 * Rules this file follows, deliberately:
 *  - Primary text is pure black on pure white (21:1). No grey body copy anywhere.
 *  - Theme is an explicit setting, never `prefers-color-scheme`: that follows the
 *    OS, and a dark UI is *harder* to read in direct sunlight, not easier.
 *  - Nothing tappable is under 64px; primary actions are 88px.
 */

:root {
  --bg: #ffffff;
  --fg: #000000;
  --fg-dim: #333333; /* 12.6:1 — the darkest "secondary" we allow */
  --surface: #f0f0f0;
  --line: #000000;

  --accent: #0047b3; /* 8.2:1 against white, and against its own white text */
  --accent-fg: #ffffff;
  --accent-soft: #dce7fb;

  --ok: #0f5c2e;
  --warn: #8a3d00;
  --danger: #a3001b;
  --danger-fg: #ffffff;

  --tap: 64px;
  --tap-lg: 88px;
  --gap: 12px;
  --pad: 16px;
  --radius: 10px;
  --border: 3px;

  --sans: system-ui, 'Segoe UI', Roboto, sans-serif;

  font-family: var(--sans);
  font-size: 20px;
  line-height: 1.35;
  color: var(--fg);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

:root[data-theme='nuit'] {
  --bg: #000000;
  --fg: #ffffff;
  --fg-dim: #cccccc;
  --surface: #1a1a1a;
  --line: #ffffff;

  --accent: #ffb000; /* amber reads well at night and preserves dark adaptation */
  --accent-fg: #000000;
  --accent-soft: #3a2a00;

  --ok: #5ce08a;
  --warn: #ffb000;
  --danger: #ff5c72;
  --danger-fg: #000000;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
}

body {
  /* Fill the notch area with the app background in a standalone PWA. */
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
    env(safe-area-inset-bottom) env(safe-area-inset-left);
  overscroll-behavior-y: contain;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.01em;
}
h1 {
  font-size: 1.6rem;
}
h2 {
  font-size: 1.25rem;
}
h3 {
  font-size: 1.05rem;
}
p {
  margin: 0;
}

/* Times and durations must never reflow as digits change. */
.tnum {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}

.dim {
  color: var(--fg-dim);
}
.center {
  text-align: center;
}

/* ------------------------------------------------------------------ controls */

button {
  font: inherit;
  font-weight: 700;
  color: var(--fg);
  background: var(--bg);
  border: var(--border) solid var(--line);
  border-radius: var(--radius);
  min-height: var(--tap);
  padding: 0 var(--pad);
  cursor: pointer;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

button:active {
  transform: translateY(2px);
}

button:focus-visible {
  outline: 4px solid var(--accent);
  outline-offset: 3px;
}

button[disabled] {
  opacity: 0.4;
  cursor: default;
}

.btn-primary {
  min-height: var(--tap-lg);
  font-size: 1.2rem;
  color: var(--accent-fg);
  background: var(--accent);
  border-color: var(--accent);
  width: 100%;
}

.btn-danger {
  color: var(--danger-fg);
  background: var(--danger);
  border-color: var(--danger);
}

.btn-row {
  display: flex;
  gap: var(--gap);
}
.btn-row > * {
  flex: 1;
}

input[type='text'],
input[type='time'],
input[type='number'],
select {
  font: inherit;
  font-weight: 600;
  color: var(--fg);
  background: var(--bg);
  border: var(--border) solid var(--line);
  border-radius: var(--radius);
  min-height: var(--tap);
  padding: 0 12px;
  width: 100%;
}

input:focus-visible,
select:focus-visible {
  outline: 4px solid var(--accent);
  outline-offset: 2px;
}

/* -------------------------------------------------------------------- layout */

.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  padding: var(--pad);
  padding-bottom: 96px; /* clear of the fixed nav */
}

.card {
  border: var(--border) solid var(--line);
  border-radius: var(--radius);
  padding: var(--pad);
  background: var(--bg);
}

.card-accent {
  background: var(--accent-soft);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.row-between {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--gap);
}

hr {
  border: 0;
  border-top: var(--border) solid var(--line);
  margin: 4px 0;
}