/* Fit — design system (§25-§30, §51, §55).
   Mobile-first: base styles target a 360-480px phone, then widen at
   640 / 768 / 1024px. */

/* ---------------------------------------------------------------- tokens */

:root {
  --background: #f7f9f8;
  --surface: #ffffff;
  --surface-secondary: #eef3f1;

  --text-primary: #26332f;
  --text-secondary: #66736f;

  --primary: #72b7a5;
  --primary-soft: #dcefea;

  --secondary: #8faee0;
  --secondary-soft: #e3ebf8;

  --accent: #f1b982;
  --accent-soft: #fbebd9;

  --success: #7ebf8e;
  --warning: #e7b96c;
  --danger: #d98c8c;

  --border: #dde5e2;

  /* Derived tokens: text that sits on a coloured chip needs its own value so
     contrast stays AA in both themes. */
  --on-primary: #10322a;
  --on-accent: #40290f;
  --danger-text: #8f3b3b;
  --success-text: #35663f;
  --shadow: 0 1px 2px rgba(38, 51, 47, 0.06), 0 4px 14px rgba(38, 51, 47, 0.05);
  --shadow-raised: 0 6px 20px rgba(38, 51, 47, 0.14);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  --tap-target: 44px;
  --nav-height: 64px;
  --content-max: 720px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --background: #161c1a;
    --surface: #202825;
    --surface-secondary: #28322f;

    --text-primary: #edf4f1;
    --text-secondary: #a9b8b3;

    --primary: #82c8b5;
    --primary-soft: #29473f;

    --secondary: #9cb8e7;
    --secondary-soft: #2f3d56;

    --accent: #efc38e;
    --accent-soft: #4b3a28;

    --success: #8cc99a;
    --warning: #e8c177;
    --danger: #e09a9a;

    --border: #36423e;

    --on-primary: #11302a;
    --on-accent: #3a2a15;
    --danger-text: #f0b6b6;
    --success-text: #a6dcb2;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 14px rgba(0, 0, 0, 0.25);
    --shadow-raised: 0 6px 20px rgba(0, 0, 0, 0.45);
  }
}

:root[data-theme="dark"] {
  --background: #161c1a;
  --surface: #202825;
  --surface-secondary: #28322f;

  --text-primary: #edf4f1;
  --text-secondary: #a9b8b3;

  --primary: #82c8b5;
  --primary-soft: #29473f;

  --secondary: #9cb8e7;
  --secondary-soft: #2f3d56;

  --accent: #efc38e;
  --accent-soft: #4b3a28;

  --success: #8cc99a;
  --warning: #e8c177;
  --danger: #e09a9a;

  --border: #36423e;

  --on-primary: #11302a;
  --on-accent: #3a2a15;
  --danger-text: #f0b6b6;
  --success-text: #a6dcb2;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 14px rgba(0, 0, 0, 0.25);
  --shadow-raised: 0 6px 20px rgba(0, 0, 0, 0.45);
}

/* ------------------------------------------------------------- base */

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
}

/* No nav rendered when signed out, so nothing needs reserving for it. */
body.no-nav { padding-bottom: 0; }

h1, h2, h3, h4 {
  margin: 0 0 var(--space-3);
  line-height: 1.25;
  font-weight: 600;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }

p { margin: 0 0 var(--space-3); }

a {
  color: var(--text-primary);
  text-decoration-color: var(--primary);
  text-underline-offset: 3px;
}

a:hover { text-decoration-color: currentColor; }

:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.icon-sprite { display: none; }

.icon {
  width: 22px;
  height: 22px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-sm { width: 18px; height: 18px; }
.icon-lg { width: 28px; height: 28px; }

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

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -100px;
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-raised);
  transition: top 0.15s ease;
}

.skip-link:focus { top: var(--space-3); }

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

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 56px;
  padding: var(--space-3) var(--space-4);
  padding-top: calc(var(--space-3) + env(safe-area-inset-top, 0px));
  background: color-mix(in srgb, var(--background) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.app-header__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.app-header__subtitle {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.app-header__spacer { margin-left: auto; }

.app-header__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-target);
  height: var(--tap-target);
  margin-left: calc(var(--space-3) * -1);
  border-radius: 50%;
  color: var(--text-primary);
}

.app-header__back:hover { background: var(--surface-secondary); }

main {
  display: block;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-4);
}

.section {
  margin-bottom: var(--space-6);
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.section__title {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.section__link {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ---------------------------------------------------------- bottom nav */

.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  align-items: center;
  height: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}

/* The wordmark belongs to the desktop sidebar only. Left visible it would take
   one of the five grid cells and push Settings onto a second row. */
.bottom-nav__brand {
  display: none;
}

.bottom-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-height: var(--tap-target);
  height: 100%;
  font-size: 0.68rem;
  font-weight: 550;
  color: var(--text-secondary);
  text-decoration: none;
}

.bottom-nav__item[aria-current="page"] {
  color: var(--primary);
}

.bottom-nav__item[aria-current="page"] .icon {
  stroke-width: 2.1;
}

/* The Add action stays visually prominent (§4). */
.bottom-nav__add {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin: 0 auto;
  border-radius: 50%;
  color: var(--on-primary);
  background: var(--primary);
  box-shadow: var(--shadow-raised);
}

.bottom-nav__add .icon { stroke-width: 2.3; }

/* ------------------------------------------------------------- cards */

.card {
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card + .card { margin-top: var(--space-3); }

.card--flat { box-shadow: none; }

.card--tinted {
  background: var(--surface-secondary);
  border-color: transparent;
  box-shadow: none;
}

/* ---------------------------------------------------------- stat grid */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.stat-grid--three { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.stat {
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.stat__label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.stat__value {
  display: block;
  margin-top: var(--space-1);
  font-size: 1.6rem;
  font-weight: 650;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stat__unit {
  font-size: 0.95rem;
  font-weight: 550;
  color: var(--text-secondary);
}

.stat__meta {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-1);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Direction is carried by an arrow glyph as well as colour (§55). */
.trend {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.trend--up { color: var(--success-text); }
.trend--down { color: var(--text-secondary); }
.trend .icon { width: 14px; height: 14px; stroke-width: 2.4; }

/* -------------------------------------------------------- quick add */

.quick-add {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
  gap: var(--space-3);
}

.quick-add__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  min-height: 84px;
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.12s ease, border-color 0.12s ease;
}

.quick-add__item:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.quick-add__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--text-primary);
}

.quick-add__name {
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.25;
}

/* ------------------------------------------------------- activity rows */

.activity-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.activity-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap-target);
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
}

.activity-row:hover { border-color: var(--primary); }

.activity-row__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 11px;
  background: var(--surface-secondary);
}

.activity-row__body { min-width: 0; flex: 1; }

.activity-row__title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.95rem;
}

.activity-row__summary {
  font-size: 0.84rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.activity-row__aside {
  flex: none;
  text-align: right;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.note-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* --------------------------------------------------------------- chips */

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 0.76rem;
  font-weight: 550;
  border-radius: 999px;
  background: var(--surface-secondary);
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid transparent;
}

.chip--primary { background: var(--primary-soft); color: var(--text-primary); }
.chip--accent { background: var(--accent-soft); color: var(--text-primary); }
.chip--outline { background: transparent; border-color: var(--border); }

/* ------------------------------------------------------------ buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--tap-target);
  padding: 10px var(--space-4);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.12s ease, border-color 0.12s ease;
}

.btn:hover { background: var(--surface-secondary); }

.btn--primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.btn--primary:hover { filter: brightness(0.96); background: var(--primary); }

.btn--danger {
  color: var(--danger-text);
  border-color: color-mix(in srgb, var(--danger) 55%, transparent);
}

.btn--ghost { background: transparent; border-color: transparent; }
.btn--ghost:hover { background: var(--surface-secondary); }

.btn--block { width: 100%; }
.btn--sm { min-height: 36px; padding: 6px var(--space-3); font-size: 0.85rem; }

.btn--icon {
  width: var(--tap-target);
  min-width: var(--tap-target);
  padding: 0;
}

.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.btn-row--end { justify-content: flex-end; }

/* Sticky save bar keeps the primary action reachable one-handed (§8). */
.form-actions {
  position: sticky;
  bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  margin-top: var(--space-5);
  background: linear-gradient(to top, var(--background) 70%, transparent);
}

.form-actions .btn { flex: 1; }

/* -------------------------------------------------------------- forms */

.field { margin-bottom: var(--space-4); }

.field__label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.field__hint {
  margin-top: 5px;
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.field__error {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 5px;
  font-size: 0.78rem;
  font-weight: 550;
  color: var(--danger-text);
}

input[type="text"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  min-height: var(--tap-target);
  padding: 10px var(--space-3);
  font: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  appearance: none;
}

textarea { min-height: 90px; resize: vertical; line-height: 1.5; }

select {
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: var(--space-6);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  outline: 3px solid color-mix(in srgb, var(--primary) 35%, transparent);
  outline-offset: 0;
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--danger);
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 var(--space-3);
}

.field-grid--pair { grid-template-columns: 1fr 1fr; }

fieldset {
  margin: 0 0 var(--space-4);
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
  margin-bottom: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.radio-list, .check-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.radio-list label,
.check-list label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap-target);
  padding: 6px var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.radio-list label:hover,
.check-list label:hover { background: var(--surface-secondary); }

input[type="radio"],
input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
  flex: none;
}

/* RPE segmented control (§21) */
.rpe-scale {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 3px;
}

.rpe-scale input { position: absolute; opacity: 0; pointer-events: none; }

.rpe-scale label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
}

.rpe-scale input:checked + label {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.rpe-scale input:focus-visible + label {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
}

.rpe-legend {
  display: flex;
  justify-content: space-between;
  margin-top: 5px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* ------------------------------------------------------ strength builder */

.exercise-block {
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.exercise-block__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.exercise-block__name {
  flex: 1;
  min-width: 0;
  font-size: 0.98rem;
  font-weight: 650;
}

.exercise-block__group {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.set-table {
  display: grid;
  grid-template-columns: 26px 1fr 1fr 44px;
  gap: var(--space-2);
  align-items: center;
}

.set-table__head {
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* RPE and rest are secondary: they only appear once the grid has six columns. */
.set-table__head--wide,
.set-table__wide { display: none; }

.set-table__number {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.set-table input {
  min-height: 42px;
  padding: 8px 10px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.set-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 42px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
}

.set-remove:hover { background: var(--surface-secondary); color: var(--danger-text); }

.exercise-block__foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.workout-total {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--primary-soft);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* -------------------------------------------------------------- charts */

.chart-card {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.chart-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.chart-card__title { margin: 0; font-size: 0.98rem; font-weight: 650; }

.chart-card__meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.chart-frame {
  position: relative;
  height: 220px;
}

.chart-frame canvas { touch-action: pan-y; }

/* Skeleton and error states for async chart loads (§53). */
.chart-skeleton {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  gap: 6px;
  padding: var(--space-4) 0;
}

.chart-skeleton span {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: var(--surface-secondary);
  animation: pulse 1.4s ease-in-out infinite;
}

.chart-skeleton span:nth-child(1) { height: 40%; animation-delay: 0s; }
.chart-skeleton span:nth-child(2) { height: 70%; animation-delay: 0.1s; }
.chart-skeleton span:nth-child(3) { height: 55%; animation-delay: 0.2s; }
.chart-skeleton span:nth-child(4) { height: 85%; animation-delay: 0.3s; }
.chart-skeleton span:nth-child(5) { height: 60%; animation-delay: 0.4s; }
.chart-skeleton span:nth-child(6) { height: 45%; animation-delay: 0.5s; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

@media (prefers-reduced-motion: reduce) {
  .chart-skeleton span { animation: none; }
  * { transition-duration: 0.01ms !important; }
}

.chart-error,
.chart-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.chart-summary {
  margin: var(--space-3) 0 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Horizontal distribution bars, preferred over pie charts (§15.3). */
.distribution { display: flex; flex-direction: column; gap: var(--space-3); }

.distribution__row { display: grid; gap: 4px; }

.distribution__meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.distribution__track {
  height: 10px;
  border-radius: 999px;
  background: var(--surface-secondary);
  overflow: hidden;
}

.distribution__fill {
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
}

/* ------------------------------------------------------------ segmented */

.segmented {
  display: flex;
  gap: 4px;
  padding: 4px;
  overflow-x: auto;
  background: var(--surface-secondary);
  border-radius: var(--radius);
  scrollbar-width: none;
}

.segmented::-webkit-scrollbar { display: none; }

.segmented__item {
  flex: 1;
  min-width: 54px;
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-3);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
}

.segmented__item[aria-current="true"] {
  background: var(--surface);
  color: var(--text-primary);
  box-shadow: var(--shadow);
}

/* ------------------------------------------------------------- banners */

.flash-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: var(--content-max);
  margin: var(--space-3) auto 0;
  padding: 0 var(--space-4);
}

.banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-size: 0.9rem;
  border: 1px solid transparent;
}

.banner--success { background: var(--primary-soft); color: var(--text-primary); }
.banner--info { background: var(--secondary-soft); color: var(--text-primary); }
.banner--error {
  background: color-mix(in srgb, var(--danger) 16%, var(--surface));
  border-color: color-mix(in srgb, var(--danger) 45%, transparent);
  color: var(--text-primary);
}

.banner__close {
  margin-left: auto;
  padding: 0;
  background: none;
  border: 0;
  color: inherit;
  cursor: pointer;
}

/* Personal record highlight (§18). */
.pr-banner {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  border-radius: var(--radius);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
}

.pr-banner__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 650;
  margin-bottom: var(--space-2);
}

.pr-banner__list { margin: 0; padding-left: var(--space-5); font-size: 0.9rem; }

.offline-banner {
  position: fixed;
  left: 50%;
  bottom: calc(var(--nav-height) + var(--space-3) + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  z-index: 40;
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 10px var(--space-4);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--text-primary);
  color: var(--background);
  box-shadow: var(--shadow-raised);
  max-width: calc(100vw - var(--space-5));
}

.offline-banner[data-visible="true"] { display: flex; }

/* ---------------------------------------------------------- empty state */

.empty-state {
  padding: var(--space-6) var(--space-4);
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.empty-state__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-3);
  border-radius: 50%;
  background: var(--primary-soft);
}

.empty-state__title { margin-bottom: var(--space-2); font-size: 1.05rem; }

.empty-state p {
  max-width: 34ch;
  margin: 0 auto var(--space-4);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ------------------------------------------------------------ calendar */

.calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar__weekday {
  padding-bottom: var(--space-2);
  font-size: 0.7rem;
  font-weight: 650;
  text-align: center;
  color: var(--text-secondary);
}

.calendar__day {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  aspect-ratio: 1;
  min-height: 42px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid transparent;
}

.calendar__day--outside { color: var(--text-secondary); opacity: 0.45; }
.calendar__day--active { background: var(--primary-soft); font-weight: 650; }
.calendar__day--today { border-color: var(--primary); }
.calendar__day--empty { cursor: default; }
a.calendar__day:hover { border-color: var(--primary); }

.calendar__dots { display: flex; gap: 2px; height: 5px; }

.calendar__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
}

.calendar__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------- lists */

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

.data-list > li + li { border-top: 1px solid var(--border); }

.data-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap-target);
  padding: var(--space-3) var(--space-4);
}

.data-row__main { flex: 1; min-width: 0; }
.data-row__title { font-weight: 600; font-size: 0.93rem; }
.data-row__meta { font-size: 0.8rem; color: var(--text-secondary); }

.data-row__value {
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.link-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap-target);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: inherit;
}

.link-row:hover { background: var(--surface-secondary); }
.link-row__chevron { margin-left: auto; color: var(--text-secondary); }

/* Metric definition list on the activity detail screen. */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
}

.metric-grid dt {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.metric-grid dd {
  margin: 2px 0 0;
  font-size: 1.05rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.set-list {
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  font-variant-numeric: tabular-nums;
}

.set-list li {
  display: flex;
  gap: var(--space-3);
  padding: 5px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.set-list li:last-child { border-bottom: 0; }
.set-list__number { width: 3.5rem; color: var(--text-secondary); }
.set-list__volume { margin-left: auto; color: var(--text-secondary); }

.notes-block {
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--surface-secondary);
  font-size: 0.92rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.filter-bar {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.table-scroll { overflow-x: auto; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
}

table.data-table th,
table.data-table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

table.data-table th {
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.muted { color: var(--text-secondary); }
.tabular { font-variant-numeric: tabular-nums; }
.text-sm { font-size: 0.85rem; }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }

/* --------------------------------------------------------- breakpoints */

@media (min-width: 640px) {
  main { padding: var(--space-5); }

  /* Forms go multi-column only once there is room (§30). */
  .field-grid { grid-template-columns: 1fr 1fr; }
  .field-grid--triple { grid-template-columns: repeat(3, 1fr); }
  .stat-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .stat-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .chart-frame { height: 260px; }
  .metric-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .set-table { grid-template-columns: 30px 1fr 1fr 1fr 1fr 44px; }
  .set-table__head--wide { display: block; }
  .set-table__wide { display: block; }
  .form-actions { justify-content: flex-end; }
  .form-actions .btn { flex: 0 1 auto; min-width: 140px; }
}

@media (min-width: 768px) {
  h1 { font-size: 1.75rem; }
  .filter-bar { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop and large tablet: swap the bottom bar for a left sidebar (§4). */
@media (min-width: 1024px) {
  body {
    padding-bottom: 0;
    padding-left: 232px;
  }

  body.no-nav { padding-left: 0; }

  .bottom-nav {
    top: 0;
    right: auto;
    bottom: 0;
    width: 232px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-1);
    padding: var(--space-5) var(--space-3);
    border-top: 0;
    border-right: 1px solid var(--border);
  }

  .bottom-nav__brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0 var(--space-3) var(--space-5);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
  }

  .bottom-nav__item {
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--space-3);
    height: auto;
    padding: 10px var(--space-3);
    font-size: 0.92rem;
    border-radius: var(--radius-sm);
  }

  .bottom-nav__item:hover { background: var(--surface-secondary); }

  .bottom-nav__item[aria-current="page"] {
    background: var(--primary-soft);
    color: var(--text-primary);
  }

  .bottom-nav__add-wrap { order: -1; margin-bottom: var(--space-3); }

  .bottom-nav__add {
    width: 100%;
    height: var(--tap-target);
    border-radius: var(--radius);
    gap: var(--space-2);
    font-weight: 650;
  }

  .app-header { padding-left: var(--space-5); }
  .form-actions { bottom: var(--space-4); }
  .offline-banner { left: calc(50% + 116px); bottom: var(--space-5); }
  main { padding: var(--space-5) var(--space-6); max-width: 900px; }
  .chart-frame { height: 300px; }
}

@media print {
  .bottom-nav, .form-actions, .offline-banner, .app-header { display: none; }
  body { padding: 0; }
}