:root {
  color-scheme: light;
  --bg: #f5f6f8;
  --panel: #ffffff;
  --text: #15181e;
  --muted: #647084;
  --line: #d9dee8;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #0f766e;
  --danger: #c2410c;
  --danger-dark: #9a3412;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: 46px;
  border: 0;
  border-radius: 8px;
  padding: 0 16px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 750;
  cursor: pointer;
}

button:hover {
  background: var(--primary-dark);
}

button.secondary {
  background: #e7ebf2;
  color: #1f2937;
}

button.secondary:hover {
  background: #d6dce8;
}

button.danger {
  background: var(--danger);
}

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

button.compact {
  min-height: 38px;
  padding: 0 12px;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: #ffffff;
  color: var(--text);
}

label span,
.eyebrow {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.app-shell {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 14px 36px;
}

.auth-view {
  display: grid;
  min-height: 92vh;
  align-content: center;
  gap: 22px;
}

.brand-block h1 {
  margin: 2px 0 0;
  font-size: clamp(2.25rem, 10vw, 4.25rem);
  line-height: 1;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-panel,
.exercise-form,
.routine-form,
.routine-item-form {
  display: grid;
  gap: 16px;
}

.auth-panel,
.toolbar {
  padding: 18px;
}

.auth-actions,
.form-actions,
.row-actions {
  display: grid;
  gap: 10px;
}

.section-actions {
  display: grid;
  align-items: center;
  gap: 8px;
  grid-auto-flow: column;
}

.form-message {
  min-height: 1.25rem;
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.topbar .eyebrow {
  color: var(--text);
  font-size: 2rem;
  font-weight: 900;
  text-transform: none;
}

.user-label {
  margin: 4px 0 0;
  color: var(--muted);
  font-weight: 700;
}

.toolbar {
  margin-bottom: 22px;
}

.tabbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 16px;
}

.tab {
  background: #e7ebf2;
  color: #1f2937;
}

.tab.active {
  background: var(--text);
  color: #ffffff;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

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

.section-heading h2 {
  margin: 0;
  font-size: 1.2rem;
}

.count-pill,
.type-badge,
.detail-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: 0 10px;
  background: #e7f4f2;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 850;
}

.detail-badge {
  background: #eef2f7;
  color: #455166;
}

.exercise-details {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.exercise-list,
.routine-list,
.routine-item-list,
.routine-layout {
  display: grid;
  gap: 10px;
}

.exercise-row,
.routine-card,
.routine-item-row {
  display: grid;
  gap: 14px;
  padding: 14px;
}

.routine-card {
  cursor: pointer;
}

.routine-card.selected {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 18px 45px rgba(37, 99, 235, 0.12);
}

.routine-editor {
  padding: 16px;
}

.routine-item-list {
  margin-top: 14px;
}

.routine-item-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  box-shadow: none;
}

.workout-start-form,
.workout-set-form {
  display: grid;
  gap: 16px;
}

.workout-session,
.workout-complete {
  padding: 18px;
}

.workout-session-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.workout-session-header h2 {
  margin: 4px 0 6px;
  font-size: 1.6rem;
}

.workout-progress,
.workout-hint,
.workout-complete-summary {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.workout-hint + .form-message {
  margin-top: 8px;
}

.workout-measure-fields {
  display: grid;
  gap: 12px;
}

.workout-measure-fields input {
  min-height: 58px;
  font-size: 1.15rem;
}

.workout-set-log {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.workout-set-chip {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  color: var(--text);
  font-size: 0.92rem;
}

.workout-set-chip span:last-child {
  color: var(--muted);
}

.exercise-main {
  min-width: 0;
}

.exercise-main h3 {
  margin: 0 0 8px;
  overflow-wrap: anywhere;
  font-size: 1.05rem;
}

.empty-state {
  margin: 18px 0;
  color: var(--muted);
  font-weight: 700;
}

@media (min-width: 680px) {
  .auth-view {
    grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.75fr);
    align-items: center;
  }

  .exercise-form {
    grid-template-columns: minmax(0, 1fr) minmax(180px, 0.35fr) minmax(180px, 0.35fr) auto;
    align-items: end;
  }

  .form-actions {
    grid-auto-flow: column;
    align-items: end;
  }

  .exercise-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .routine-layout {
    grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
    gap: 14px;
  }

  .routine-form {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .routine-item-form {
    grid-template-columns: minmax(0, 1fr) minmax(96px, 0.25fr) minmax(96px, 0.25fr) auto;
    align-items: end;
  }

  .routine-card,
  .routine-item-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .workout-start-form {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 0.8fr) auto;
    align-items: end;
  }

  .workout-measure-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .row-actions {
    grid-auto-flow: column;
  }
}