:root {
  --bg: #f8f9fa;
  --bg-elevated: #ffffff;
  --bg-hover: #f3f4f6;
  --border: #e5e7eb;
  --text: #1f2937;
  --text-muted: #6b7280;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-text: #ffffff;
  --accent-muted: #1e40af;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 20px 16px 32px;
}

body.has-tab-nav .app-shell {
  padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.topbar-start {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.topbar-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-heading {
  margin: 0 0 20px;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
}

.menu {
  position: relative;
  flex-shrink: 0;
}

.menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text-muted);
  opacity: 0.35;
  border-radius: 1px;
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 120px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 6px;
  z-index: 30;
}

.menu-dropdown a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.menu-dropdown a:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.menu.open .menu-dropdown {
  display: block;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #2563eb);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.2);
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.card + .card,
.exercise-card + .exercise-card {
  margin-top: 12px;
}

.exercise-card {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease;
}

.exercise-card:hover,
.exercise-card:focus-visible {
  border-color: #d1d5db;
}

.exercise-card h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.add-exercise-card {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 12px;
  border-style: dashed;
  border-color: #d1d5db;
  box-shadow: none;
  cursor: pointer;
  color: var(--text-muted);
  font-weight: 600;
}

.add-exercise-card:hover {
  border-color: #c5cbd3;
  color: var(--text);
}

.add-exercise-label {
  font-size: 1rem;
}

.tab-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 4px;
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  z-index: 15;
}

.tab-nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
  transition: background 0.15s ease, color 0.15s ease;
}

.tab-nav-link.active {
  color: var(--text);
  font-weight: 600;
  background: var(--bg-hover);
}

.week-nav {
  display: grid;
  grid-template-columns: 40px 1fr 40px;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.week-nav-range {
  text-align: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.2;
}

.week-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 1.1rem;
}

.week-nav-btn-disabled {
  opacity: 0.35;
  pointer-events: none;
}

.calendar-legend {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.calendar-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.calendar-swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  display: inline-block;
}

.calendar-swatch.workout {
  background: #22c55e;
}

.calendar-swatch.rest {
  background: #ef4444;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.calendar-weekday {
  text-align: center;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding-bottom: 4px;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
  border: 1px solid transparent;
}

.calendar-day-empty {
  visibility: hidden;
  pointer-events: none;
}

.calendar-day-muted {
  background: var(--bg-hover);
  color: var(--text-muted);
  font-weight: 500;
}

.calendar-day-workout {
  background: #dcfce7;
  color: #166534;
  border-color: #86efac;
}

.calendar-day-rest {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
}

.calendar-day.is-today {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.calendar-day-workout:active,
.calendar-day-rest:active {
  transform: scale(0.96);
}

.day-card .exercise-meta {
  margin-top: 4px;
}

.day-no-workout {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.exercise-day-group {
  margin-bottom: 12px;
}

.exercise-day-group h2.exercise-day-name {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 600;
}

.set-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}

.set-row:first-of-type {
  border-top: none;
  padding-top: 0;
}

.set-label {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.exercise-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.exercise-meta strong {
  color: var(--text);
  font-weight: 600;
}

.exercise-best {
  margin: 0 0 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.exercise-best strong {
  color: var(--text);
  font-weight: 600;
}

.exercise-last-done {
  width: 100%;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--text-muted);
}

.input {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 12px 14px;
  font-size: 16px;
  outline: none;
}

.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}

.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  cursor: pointer;
  transition: background 0.15s ease, opacity 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  font-weight: 600;
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  padding: 8px 10px;
}

.btn-block {
  width: 100%;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
}

.tab {
  text-align: center;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text-muted);
  font-weight: 500;
}

.tab.active {
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.errorlist {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  color: var(--danger);
  font-size: 0.85rem;
}

.messages {
  margin-bottom: 16px;
}

.message {
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent-muted);
  font-size: 0.9rem;
}

.stepper-group {
  margin-bottom: 20px;
}

.stepper-label {
  display: block;
  margin-bottom: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.stepper {
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  gap: 10px;
  align-items: center;
}

.stepper > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 52px;
}

.stepper-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 1.4rem;
  line-height: 1;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.stepper-btn:active {
  background: var(--bg-hover);
}

.stepper-value,
.stepper-input {
  width: 100%;
  text-align: center;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: transparent;
  border: none;
  color: var(--text);
  outline: none;
  padding: 0;
  margin: 0;
}

.stepper-input {
  font-size: 1.75rem;
  height: auto;
  -moz-appearance: textfield;
  appearance: textfield;
}

.stepper-input::-webkit-outer-spin-button,
.stepper-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.stepper-input:focus {
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
  border-radius: 8px;
}

.stepper-weight {
  position: relative;
  min-width: 7rem;
}

.stepper-weight-label {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  text-align: center;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text);
  pointer-events: none;
}

.stepper-input.is-special {
  color: transparent;
  caret-color: transparent;
}

.stepper-unit {
  display: block;
  margin-top: 2px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 400;
  line-height: 1;
}

.view-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 16px;
  padding: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.view-tab {
  border: none;
  background: transparent;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text-muted);
  font-weight: 500;
  cursor: pointer;
}

.view-tab.active {
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

.period-select-wrap {
  margin-bottom: 12px;
}

.weight-chart-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.weight-chart-controls .period-select {
  flex: 1;
  min-width: 0;
}

.forecast-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 500;
  user-select: none;
  cursor: pointer;
}

.forecast-toggle input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  margin: 0;
}

.period-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 16px;
}

.chart-card {
  padding: 12px;
}

#progress-chart,
#body-weight-chart {
  width: 100%;
  height: auto;
  display: block;
}

.chart-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart-line-trend {
  stroke: var(--accent);
  stroke-width: 2.5;
}

.chart-line-forecast {
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 5 4;
  opacity: 0.75;
}

.chart-dot {
  fill: var(--accent);
}

.chart-dot-raw {
  fill: var(--text-muted);
  opacity: 0.45;
}

.chart-dot-trend {
  fill: var(--accent);
}

.chart-dot-forecast {
  fill: var(--bg-elevated);
  stroke: var(--accent);
  stroke-width: 1.5;
}

.chart-goal-line {
  stroke: var(--text-muted);
  stroke-width: 1;
  stroke-dasharray: 4 3;
  opacity: 0.55;
}

.chart-goal-label {
  fill: var(--text-muted);
  font-size: 9px;
}

.weight-insight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.weight-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.weight-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.weight-stat-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.weight-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.weight-chart-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.legend-swatch {
  width: 12px;
  height: 3px;
  border-radius: 2px;
  display: inline-block;
}

.legend-raw {
  height: 6px;
  width: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.55;
}

.legend-trend {
  background: var(--accent);
  height: 3px;
}

.legend-forecast {
  background: transparent;
  border-top: 2px dashed var(--accent);
  height: 0;
  opacity: 0.8;
}

.chart-grid {
  stroke: var(--border);
  stroke-width: 1;
  stroke-dasharray: 3 4;
  opacity: 0.7;
}

.chart-axis {
  stroke: var(--border);
  stroke-width: 1;
  opacity: 1;
}

.chart-label {
  fill: var(--text-muted);
  font-size: 10px;
}

.chart-x-label {
  font-size: 9px;
}

.chart-y-label {
  font-size: 9px;
}

.chart-tick {
  stroke: var(--border);
  stroke-width: 1;
}

.chart-empty {
  margin: 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 24px 0;
}

.auth-shell {
  padding-top: 48px;
}

.auth-brand {
  margin-bottom: 24px;
}

.log-list {
  margin-top: 16px;
}

.log-list h3 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.log-list .card {
  padding: 0;
  overflow: hidden;
}

.swipe-row {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.swipe-row:last-child {
  border-bottom: none;
}

.swipe-actions {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 88px;
  display: flex;
  align-items: stretch;
}

.swipe-delete-form {
  width: 100%;
  height: 100%;
}

.swipe-delete-btn {
  width: 100%;
  height: 100%;
  border: none;
  background: var(--danger);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
}

.swipe-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-elevated);
  font-size: 0.92rem;
  transition: transform 0.2s ease;
  will-change: transform;
}

.swipe-content.open {
  transform: translateX(-88px);
}

.log-time {
  color: var(--text-muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  display: none;
  align-items: flex-end;
  justify-content: center;
  padding: 16px;
  z-index: 20;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  width: 100%;
  max-width: 480px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px 16px 12px 12px;
  padding: 20px 16px 16px;
  box-shadow: var(--shadow);
}

.modal h2 {
  margin: 0 0 16px;
  font-size: 1.1rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  flex-shrink: 0;
  padding: 4px 0;
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent-muted);
  font-size: 0.82rem;
  margin-bottom: 20px;
}

@media (min-width: 480px) {
  .modal-backdrop {
    align-items: center;
  }

  .modal {
    border-radius: var(--radius);
  }
}