* {
  box-sizing: border-box;
}

:root {
  --bg-page: #f3f4f6;
  --bg-surface: #ffffff;
  --bg-soft: #f9fafb;
  --text-primary: #111827;
  --text-muted: #4b5563;
  --border-default: #e5e7eb;
  --border-strong: #d1d5db;
  --brand-primary: #111827;
  --brand-secondary: #374151;
  --danger: #b91c1c;
  --radius-card: 0.75rem;
  --radius-control: 0.55rem;
  --space-card-y: 1rem;
  --space-card-x: 1.25rem;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.45;
}

a:not(.button) {
  color: #1f2937;
}

a:not(.button):hover {
  color: #111827;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem;
}

.narrow {
  max-width: 560px;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-card);
  padding: var(--space-card-y) var(--space-card-x);
  margin-bottom: 1rem;
}

.page-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 1rem;
}

.page-header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  flex-wrap: wrap;
  justify-self: end;
}

.page-header-actions form {
  margin: 0;
}

.page-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.page-links a {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border: 1px solid var(--border-strong);
  border-radius: 0.5rem;
  padding: 0.28rem 0.65rem;
  color: var(--text-primary);
  background: #ffffff;
  font-size: 0.92rem;
}

.page-links a:hover {
  background: #f8fafc;
  border-color: #c7cfd9;
  color: var(--text-primary);
}

.page-links a[aria-current="page"] {
  background: #eef2f7;
  border-color: #c7cfd9;
  font-weight: 600;
}

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

h1,
h2 {
  margin: 0 0 0.5rem;
}

p {
  margin: 0.4rem 0;
}

ul.clean-list {
  margin: 0.45rem 0 0;
  padding-left: 1.1rem;
}

.metric {
  font-size: 2rem;
  font-weight: 700;
  margin: 0.4rem 0 0;
}

.stack {
  display: grid;
  gap: 0.8rem;
}

.stack > button,
.stack > .button {
  justify-self: start;
  width: auto;
}

label {
  display: grid;
  gap: 0.35rem;
}

input,
select,
textarea,
button {
  font: inherit;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border-strong);
  border-radius: 0.5rem;
  background: white;
}

button,
.button {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  background: var(--brand-primary);
  color: #ffffff;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-control);
  font-weight: 600;
  line-height: 1.2;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.button:visited {
  color: #ffffff;
}

button:hover,
.button:hover {
  background: #1f2937;
  border-color: #1f2937;
  color: #ffffff;
  filter: none;
}

.secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.secondary:visited {
  color: var(--text-primary);
}

.secondary:hover {
  background: var(--bg-soft);
  color: var(--text-primary);
  border-color: #c7cfd9;
  filter: none;
}

.danger {
  background: #fff5f5;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.danger:visited {
  color: #991b1b;
}

.danger:hover {
  background: #fee2e2;
  color: #7f1d1d;
  border-color: #fca5a5;
  filter: none;
}

.button-sm,
button.button-sm {
  padding: 0.45rem 0.7rem;
  font-size: 0.92rem;
}

.error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #7f1d1d;
  border-radius: 0.5rem;
  padding: 0.6rem 0.75rem;
}

.success-banner {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  border-radius: 0.5rem;
  padding: 0.6rem 0.75rem;
}

.muted {
  color: #6b7280;
}

.flash-stack {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
  padding: 0.55rem 0.45rem;
}

thead th {
  background: var(--bg-soft);
}

fieldset.exercise {
  border: 1px solid #e5e7eb;
  border-radius: 0.6rem;
  padding: 0.75rem;
}

fieldset.exercise legend {
  font-weight: 600;
}

.prescription {
  color: #374151;
}

.radio-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 0.35rem 0;
}

.button-row {
  display: flex;
  gap: 0.6rem;
  row-gap: 0.45rem;
  flex-wrap: wrap;
  align-items: center;
}

.token-code {
  display: inline-block;
  max-width: 100%;
  word-break: break-all;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
}

.editor-mode-toggle {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
}

.plan-calendar {
  display: grid;
  gap: 0.7rem;
}

.plan-calendar-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.55rem;
}

.plan-calendar-header h3 {
  text-align: center;
  margin: 0;
  font-size: 1.55rem;
  letter-spacing: 0.01em;
}

.plan-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0;
}

.weekday-headings {
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.weekday-headings div {
  padding: 0.32rem 0;
}

.plan-calendar-month {
  border: 1px solid var(--border-default);
  border-radius: 0.75rem;
  overflow: hidden;
  background: #fff;
}

.plan-calendar-day {
  border-right: 1px solid var(--border-default);
  border-bottom: 1px solid var(--border-default);
  padding: 0.45rem;
  background: #fff;
  min-height: 5.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.3rem;
  text-decoration: none;
  color: var(--text-primary);
  border-radius: 0;
  transition: background 140ms ease;
}

.plan-calendar-day:hover {
  background: #f7f9fc;
}

.plan-calendar-day.today {
  background: #f0f6ff;
}

.plan-calendar-day.selected {
  box-shadow: inset 0 0 0 2px #1f2937;
  background: #eef2f7;
}

.plan-calendar-day.outside-month {
  background: #f8fafc;
}

.plan-calendar-day:nth-child(7n) {
  border-right: none;
}

.plan-calendar-day:nth-last-child(-n + 7) {
  border-bottom: none;
}

.plan-calendar-day.outside-month .plan-calendar-day-number {
  color: #9ca3af;
}

.plan-calendar-day-number {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
}

.plan-calendar-day.today .plan-calendar-day-number {
  display: inline-flex;
  width: 1.7rem;
  height: 1.7rem;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #dbeafe;
}

.plan-calendar-day.selected .plan-calendar-day-number {
  display: inline-flex;
  width: 1.7rem;
  height: 1.7rem;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #1f2937;
  color: #fff;
}

.plan-calendar-day-meta {
  min-height: 1.2rem;
  display: flex;
  align-items: center;
}

.plan-calendar-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  height: 1.6rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid #d1d5db;
  color: #374151;
  background: #f9fafb;
}

.plan-calendar-day.selected .plan-calendar-count {
  border-color: #9ca3af;
  background: #fff;
}

.plan-session-chip {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: 0.55rem;
  padding: 0.38rem 0.52rem;
  background: #fff;
}

.plan-session-chip span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.plan-session-chip.active {
  border-color: var(--brand-secondary);
  background: #f9fafb;
  box-shadow: inset 0 2px 0 0 var(--brand-secondary);
}

.plan-day-detail {
  margin-top: 0.25rem;
  border-top: 1px solid var(--border-default);
  padding-top: 0.8rem;
}

.workspace-tabs {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.workspace-tab {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border: 1px solid var(--border-strong);
  border-radius: 0.55rem;
  padding: 0.4rem 0.7rem;
  color: var(--text-primary);
  background: #fff;
  font-weight: 600;
}

.workspace-tab:hover {
  background: #f8fafc;
  border-color: #c7cfd9;
  color: var(--text-primary);
}

.workspace-tab.active {
  background: #eef2f7;
  border-color: #c7cfd9;
}

.plan-editor-split {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1rem;
  align-items: start;
}

.session-nav {
  position: sticky;
  top: 1rem;
}

.session-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: grid;
  gap: 0.5rem;
}

.session-list a {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  padding: 0.55rem 0.65rem;
  background: #ffffff;
}

.session-list a.active {
  border-color: #111827;
}

.session-list a span {
  display: block;
  margin-top: 0.2rem;
  color: #4b5563;
  font-size: 0.9rem;
}

.session-card-list {
  display: grid;
  gap: 0.8rem;
}

.session-card {
  border: 1px solid var(--border-strong);
  border-radius: 0.6rem;
  padding: 0.75rem 0.85rem;
  background: var(--bg-surface);
}

.pager-row {
  margin-top: 0.7rem;
}

.exercise-form-grid {
  display: grid;
  gap: 0.7rem 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(12.5rem, 1fr));
  justify-content: start;
  align-items: start;
}

.exercise-form-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: min(100%, 19rem);
}

.exercise-form-grid .exercise-wide-field {
  grid-column: 1 / -1;
  max-width: min(100%, 33rem);
}

.exercise-key-metrics-row {
  grid-column: 1 / -1;
  display: grid;
  gap: 0.7rem 0.9rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: start;
}

.exercise-key-metrics-row label {
  max-width: 100%;
}

.exercise-key-metrics-row .exercise-compact-field input,
.exercise-key-metrics-row .exercise-compact-field select {
  min-width: 0;
}

.exercise-nav-row {
  margin-bottom: 0.65rem;
}

.exercise-nav-row .button,
.exercise-nav-row button {
  padding: 0.45rem 0.7rem;
  font-size: 0.92rem;
}

.exercise-required-groups {
  display: grid;
  gap: 0.6rem;
}

.exercise-required-card {
  border: 1px solid #e5e7eb;
  border-radius: 0.55rem;
  padding: 0.6rem 0.7rem;
  background: #f9fafb;
}

.subtle-text {
  margin: 0 0 0.55rem;
  color: #4b5563;
  font-size: 0.92rem;
}

.exercise-optional {
  border: 1px solid #e5e7eb;
  border-radius: 0.55rem;
  padding: 0.2rem 0.65rem 0.65rem;
}

.exercise-optional > summary {
  cursor: pointer;
  font-weight: 600;
  margin: 0.35rem 0 0.35rem;
}

.exercise-optional .exercise-form-grid {
  margin-top: 0.35rem;
}

.workout-accordion-list {
  display: grid;
  gap: 0.7rem;
}

.workout-accordion {
  border: 1px solid var(--border-strong);
  border-radius: 0.6rem;
  background: var(--bg-surface);
  overflow: hidden;
  transition: border-color 140ms ease, background-color 140ms ease, box-shadow 140ms ease;
}

.workout-accordion-summary {
  cursor: pointer;
  list-style: none;
  padding: 0.7rem 0.8rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: flex-start;
  gap: 0.75rem;
  border-radius: inherit;
}

.workout-accordion-main {
  min-width: 0;
  display: grid;
  gap: 0.25rem;
}

.workout-accordion-summary:hover {
  background: var(--bg-soft);
}

.workout-accordion[open] {
  border-color: var(--brand-secondary);
  background: #f9fafb;
  box-shadow: inset 0 3px 0 0 var(--brand-secondary);
}

.workout-accordion[open] .workout-accordion-summary {
  background: #f9fafb;
}

.workout-accordion-summary::-webkit-details-marker {
  display: none;
}

.workout-accordion-summary p {
  margin: 0.25rem 0 0;
}

.workout-accordion-metrics {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
}

.workout-accordion-cta {
  display: inline-block;
  border: 1px dashed var(--border-strong);
  border-radius: 999px;
  padding: 0.24rem 0.58rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: #fff;
  white-space: nowrap;
  align-self: start;
  justify-self: end;
}

.workout-accordion-cta .cta-open {
  display: none;
}

.workout-accordion[open] .workout-accordion-cta {
  border-style: solid;
  border-color: var(--brand-secondary);
  color: var(--brand-secondary);
  background: #f3f4f6;
}

.workout-accordion[open] .workout-accordion-cta .cta-closed {
  display: none;
}

.workout-accordion[open] .workout-accordion-cta .cta-open {
  display: inline;
}

.workout-pill {
  display: inline-block;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  font-size: 0.86rem;
  white-space: nowrap;
  background: var(--bg-soft);
}

.workout-pill-ok {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #065f46;
}

.workout-pill-warn {
  background: #fef2f2;
  border-color: #fecaca;
  color: #7f1d1d;
}

.workout-accordion-body {
  border-top: 1px solid var(--border-default);
  padding: 0.65rem 0.8rem 0.8rem;
  background: #fff;
}

.desktop-only {
  display: block;
}

.mobile-only {
  display: none;
}

.toast-card {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 20;
  max-width: min(28rem, calc(100vw - 2rem));
  border-color: #34d399;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

#submit-result {
  min-height: 1.5rem;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .container {
    padding: 0.75rem;
  }

  .card {
    padding: 0.85rem;
  }

  .toast-card {
    position: static;
    max-width: 100%;
  }

  .row-between {
    flex-direction: column;
    align-items: flex-start;
  }

  .desktop-only {
    display: none;
  }

  .mobile-only {
    display: block;
  }

  .plan-editor-split {
    display: block;
  }

  .session-nav {
    position: static;
    margin-bottom: 0.8rem;
  }

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

  table.responsive-table thead {
    display: none;
  }

  table.responsive-table,
  table.responsive-table tbody,
  table.responsive-table tr,
  table.responsive-table td {
    display: block;
    width: 100%;
  }

  table.responsive-table tr {
    border: 1px solid #e5e7eb;
    border-radius: 0.6rem;
    padding: 0.5rem 0.7rem;
    margin-bottom: 0.6rem;
    background: #ffffff;
  }

  table.responsive-table td {
    border: 0;
    padding: 0.35rem 0;
    display: grid;
    grid-template-columns: 7.25rem 1fr;
    gap: 0.5rem;
    align-items: start;
  }

  table.responsive-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: #374151;
  }

  table.responsive-table td.no-label {
    grid-template-columns: 1fr;
  }

  table.responsive-table td.no-label::before {
    content: "";
  }

  table.responsive-table td.actions-cell {
    grid-template-columns: 1fr;
  }

  .button-row {
    gap: 0.5rem;
  }

  .page-header-actions {
    width: auto;
  }

  .actions-cell .button-row {
    flex-direction: row;
    width: auto;
    justify-content: flex-start;
  }

  .exercise-nav-row .button-row {
    flex-direction: row;
    width: auto;
  }

  .exercise-form-grid {
    grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  }

  .exercise-form-grid label {
    max-width: 100%;
  }

  .exercise-key-metrics-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .plan-calendar-header h3 {
    font-size: 1.25rem;
  }

  .weekday-headings {
    font-size: 0.66rem;
    letter-spacing: 0.03em;
  }

  .plan-calendar-day {
    min-height: 3.9rem;
    padding: 0.34rem;
  }

  .plan-calendar-day-number {
    font-size: 0.95rem;
  }

  .plan-calendar-count {
    min-width: 1.35rem;
    height: 1.35rem;
    font-size: 0.7rem;
  }

}