/* Mobile-first base styles. Touch targets are at least 44px high. */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1b1f24;
  --muted: #5b6470;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --error: #b42318;
  --border: #d0d5dd;
  --radius: 10px;
  --touch: 44px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #181c22;
    --text: #e6e9ee;
    --muted: #9aa4b2;
    --accent: #4c8dff;
    --accent-text: #0f1216;
    --error: #ff8a80;
    --border: #2d333b;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0 1rem;
  padding: 0.5rem 1rem;
  padding-top: max(0.5rem, env(safe-area-inset-top));
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar form {
  margin: 0;
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  min-height: var(--touch);
  display: inline-flex;
  align-items: center;
}

.content {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem;
}

h1 {
  font-size: 1.5rem;
  margin: 0.5rem 0 1rem;
}

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

input {
  min-height: var(--touch);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  /* 16px prevents zoom-on-focus in mobile browsers. */
  font-size: 1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  min-width: var(--touch);
  padding: 0.5rem 1rem;
  border: 0;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.stack .button {
  margin-top: 0.5rem;
}

.button-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}

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

h2 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

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

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.actions .button {
  flex: 1;
}

.messages {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.message {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.message-error {
  color: var(--error);
}

/* Lists */

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.list-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-top: 1px solid var(--border);
}

.list-row:first-child {
  border-top: 0;
}

.list-link {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: var(--touch);
  padding: 0.5rem 1rem;
  color: var(--text);
  text-decoration: none;
}

.list-row form {
  margin: 0 0.5rem 0 0;
}

.archived {
  margin-top: 1.5rem;
}

.archived summary {
  min-height: var(--touch);
  display: flex;
  align-items: center;
  cursor: pointer;
  color: var(--muted);
}

/* Segmented radio buttons */

.segmented {
  display: flex;
  gap: 0.5rem;
  margin: 0.5rem 0 0;
  padding: 0;
  border: 0;
}

.segmented legend {
  margin-bottom: 0.5rem;
  padding: 0;
}

.segment {
  flex: 1;
  position: relative;
}

.segment input {
  position: absolute;
  opacity: 0;
  inset: 0;
  min-height: 0;
}

.segment span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-weight: 600;
  cursor: pointer;
}

.segment input:checked + span {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.segment input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.button-small {
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--touch);
  padding: 0 0.5rem;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.button-large {
  min-height: 56px;
  font-size: 1.125rem;
}

.button-block {
  width: 100%;
}

.end-form {
  margin-top: 2rem;
}

.duration {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 1.25rem;
}

.status {
  flex: none;
  min-width: 5.5rem;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.8rem;
  text-align: center;
  color: var(--muted);
}

.status-started {
  border-color: var(--accent);
  color: var(--accent);
}

.status-finished {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.add-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

select {
  flex: 1;
  min-width: 0;
  min-height: var(--touch);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}

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

/* Set recording */

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--touch);
  color: var(--accent);
  text-decoration: none;
}

.sets {
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
  counter-reset: set;
}

.set-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  counter-increment: set;
}

.set-row::before {
  content: counter(set);
  flex: none;
  width: 1.75rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.set-confirmed .set-values {
  flex: 1;
  font-size: 1.25rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.set-actions {
  display: flex;
  gap: 0.25rem;
}

.set-pending {
  opacity: 0.85;
}

.set-form {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.num-input {
  width: 6rem;
  min-width: 0;
  font-size: 1.25rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.num-input-small {
  width: 4.5rem;
}

.unit {
  color: var(--muted);
  white-space: nowrap;
}

.confirm-button {
  flex: none;
  width: 52px;
  min-height: 52px;
  padding: 0;
  font-size: 1.5rem;
}

.set-errors {
  flex-basis: 100%;
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.25rem;
  font-size: 0.875rem;
}

.finish-form {
  margin-top: 1.5rem;
}

.segment input:disabled + span {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Training history */

.button-danger {
  background: transparent;
  color: var(--error);
  border: 1px solid var(--error);
}

.history-active {
  margin-bottom: 1rem;
}

.list-heading {
  padding: 0.75rem 1rem 0.25rem;
  border-top: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--muted);
}

.list-heading:first-child {
  border-top: 0;
}

.history-link {
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.history-totals {
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.list-more {
  padding: 0.5rem;
  border-top: 1px solid var(--border);
}

.summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin: 0 0 1rem;
}

.summary div {
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.summary dt {
  font-size: 0.8rem;
  color: var(--muted);
}

.summary dd {
  margin: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.exercise-summary h2 {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.exercise-summary h2 .muted {
  font-weight: 400;
  font-size: 0.9rem;
}

.set-summary {
  margin: 0;
  padding: 0.5rem 0.75rem 0.5rem 2.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-variant-numeric: tabular-nums;
}

.last-session {
  display: flex;
  flex-direction: column;
  min-height: var(--touch);
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
}

.last-session .muted {
  font-size: 0.8rem;
}

/* Machine hints */

.hint-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hint {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.5rem 0.5rem 1rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.hint form {
  margin: 0;
}

.hint-list-open .hint {
  border: 2px solid var(--accent);
  font-weight: 600;
}

.hint-text {
  flex: 1;
  overflow-wrap: anywhere;
}

.hints-new {
  margin-top: 2rem;
}

.hints-new input[type="text"] {
  flex: 1;
  min-width: 0;
}

.history-sets {
  font-variant-numeric: tabular-nums;
}

.history-when .status {
  margin-left: 0.5rem;
}