/* One stylesheet. The app has a handful of screens and a single job — be
   readable at arm's length, one-handed, in bad light, with chalk on your
   fingers. Everything here serves that.

   Targets are 56px minimum because the user is often holding something.
   Contrast is checked against WCAG 2.2 AA on both themes. */

:root {
  --bg: #fbfaf8;
  --ink: #16181d;
  --muted: #5b6472;
  --line: #e2e0dc;
  --accent: #a8402f;
  --accent-ink: #ffffff;
  --surface: #ffffff;
  --danger: #a3241a;
  --tap: 3.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12131a;
    --ink: #f0f1f5;
    --muted: #9aa6b8;
    --line: #2a2d38;
    --accent: #e08a6d;
    --accent-ink: #1a1005;
    --surface: #1a1c25;
    --danger: #f08b7f;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 32rem;
  margin: 0 auto;
  padding: max(1.5rem, env(safe-area-inset-top)) 1.25rem
    max(1.5rem, env(safe-area-inset-bottom));
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.screen {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex: 1;
  padding-block: 1rem;
}

.screen.centred {
  justify-content: center;
  text-align: center;
  align-items: stretch;
}

h1 {
  font-size: 1.9rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 650;
}

.session-name {
  font-size: 3rem;
  letter-spacing: -0.03em;
}

.exercise-name {
  font-size: 2.1rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.9rem;
}

.reason {
  font-size: 0.95rem;
}

.error {
  color: var(--danger);
  font-size: 0.95rem;
}

.or {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* --- the weight, which is the point of the screen --- */

.load {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-block: 0.5rem;
}

.load-value {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.35rem;
  flex: 1;
}

.load-input {
  font-size: clamp(3.5rem, 22vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  width: 100%;
  max-width: 6em;
  text-align: right;
  border: none;
  background: none;
  color: inherit;
  font-family: inherit;
  padding: 0;
  font-variant-numeric: tabular-nums;
}

.load-input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 0.25rem;
}

.load .unit {
  font-size: 1.25rem;
  color: var(--muted);
  font-weight: 500;
}

.load.bodyweight .load-value {
  font-size: 2rem;
  font-weight: 650;
  justify-content: center;
}

.nudge {
  width: var(--tap);
  height: var(--tap);
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
}

.set-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  font-size: 1.05rem;
}

.set-label {
  color: var(--muted);
}

.reps-input {
  width: 3.5rem;
  height: var(--tap);
  font-size: 1.5rem;
  font-weight: 650;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: var(--surface);
  color: inherit;
  font-family: inherit;
}

.set-target {
  color: var(--muted);
}

/* --- buttons --- */

button {
  font: inherit;
  min-height: var(--tap);
  border-radius: 0.75rem;
  cursor: pointer;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
}

button:disabled {
  opacity: 0.55;
  cursor: default;
}

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

.primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 650;
  border: none;
}

.primary.big {
  min-height: 4rem;
  font-size: 1.2rem;
}

.secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
  font-weight: 550;
}

.quiet {
  background: none;
  color: var(--muted);
  border: none;
  min-height: 2.75rem;
  font-size: 0.95rem;
}

.choices {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.choice {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  align-items: flex-start;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 1.1rem 1.25rem;
  font-weight: 550;
}

.choice .muted {
  font-size: 0.9rem;
  font-weight: 400;
}

/* --- forms --- */

.stack,
.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stack {
  gap: 1rem;
}

label {
  font-weight: 550;
  font-size: 0.95rem;
}

input[type="email"],
input[type="text"]:not(.load-input) {
  min-height: var(--tap);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  padding: 0 0.9rem;
  font: inherit;
  background: var(--surface);
  color: inherit;
  width: 100%;
}

.with-unit {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.with-unit .unit {
  color: var(--muted);
}

/* --- rest timer --- */

.timer {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: stretch;
}

.timer-track {
  height: 0.4rem;
  background: var(--line);
  border-radius: 0.2rem;
  overflow: hidden;
}

.timer-bar {
  height: 100%;
  background: var(--accent);
  transition: width 1s linear;
}

.timer-readout {
  font-size: clamp(3rem, 18vw, 4.5rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  text-align: center;
}

.timer-readout.over {
  color: var(--muted);
}

.timer-controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

.adjust {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
  flex: 1;
  font-variant-numeric: tabular-nums;
}

.up-next {
  font-size: 1.5rem;
}

@media (prefers-reduced-motion: reduce) {
  .timer-bar {
    transition: none;
  }
}