:root {
  --color-midnight-oil: #151515;
  --color-smokey-carbon: #1f1f1c;
  --color-deep-graphite: #282828;
  --color-iron-oxide: #343434;
  --color-cool-stone: #3a3a3a;
  --color-muted-ash: #414141;
  --color-shadow-white: #a0a0a0;
  --color-cloud-white: #ffffff;
  --color-highlight-silver: #dfdfdf;
  --color-silken-whisper: #bcbcbb;
  --color-border-light: #e5e7eb;
  --color-chartreuse-zap: #faff69;
  --color-veridian-stroke: #4f5100;
  --color-emerald-glint: #fbff46;
  --color-alert-red: #ff7575;
  --gradient-halo: linear-gradient(to right, rgba(0, 0, 0, 0), rgb(250, 255, 105), rgba(0, 0, 0, 0));
  --font-inter: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-basier: Basier, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-inconsolata: Inconsolata, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --bg: var(--color-midnight-oil);
  --surface: var(--color-smokey-carbon);
  --surface-2: var(--color-deep-graphite);
  --ink: var(--color-cloud-white);
  --muted: var(--color-shadow-white);
  --line: var(--color-cool-stone);
  --accent: var(--color-chartreuse-zap);
  --accent-ink: var(--color-midnight-oil);
  --warn: var(--color-alert-red);
  --shadow: rgba(0, 0, 0, 0.06) 0 4px 4px 0, rgba(0, 0, 0, 0.14) 0 4px 25px 0 inset;
  --radius-card: 8px;
  --radius-control: 4px;
  --radius-pill: 9999px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -120px, rgba(250, 255, 105, 0.12), rgba(21, 21, 21, 0) 320px),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-inter);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 28px;
  border-bottom: 1px solid var(--color-iron-oxide);
  background: rgba(21, 21, 21, 0.92);
  backdrop-filter: blur(14px);
}

.brand,
.nav,
.nav form {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  color: var(--color-cloud-white);
  font-weight: 700;
}

.brand-mark {
  width: 16px;
  height: 16px;
  display: inline-block;
  border: 1px solid var(--accent);
  background: var(--accent);
  box-shadow: 0 0 22px rgba(250, 255, 105, 0.28);
}

.nav {
  gap: 18px;
  color: var(--color-silken-whisper);
  font-size: 14px;
  font-weight: 500;
}

.nav a,
.text-button {
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.nav a:hover,
.nav a.active {
  color: var(--accent);
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 80px;
}

.hero,
.page-title,
.login-panel,
.panel,
.toolbar-panel,
.notes-panel,
.empty {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(31, 31, 28, 0.88);
  box-shadow: var(--shadow);
}

.hero,
.page-title {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: flex-end;
  padding: 34px;
  margin-bottom: 22px;
  overflow: hidden;
}

.hero::before,
.page-title::before,
.login-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: var(--gradient-halo);
  opacity: 0.55;
}

.hero > *,
.page-title > *,
.login-panel > * {
  position: relative;
}

.hero h1,
.page-title h1,
.login-panel h1,
.empty h1 {
  margin: 0;
  color: var(--color-cloud-white);
  font-family: var(--font-basier);
  font-size: 56px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 8px;
  color: var(--color-cloud-white);
  font-family: var(--font-basier);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.33;
  letter-spacing: 0;
}

p {
  margin: 0;
  color: var(--muted);
}

.eyebrow {
  margin-bottom: 10px;
  color: var(--accent);
  font-family: var(--font-inconsolata);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(86px, 1fr));
  gap: 1px;
  min-width: 330px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--line);
  overflow: hidden;
}

.metrics.slim {
  grid-template-columns: repeat(2, minmax(96px, 1fr));
  min-width: 230px;
}

.metrics div {
  padding: 18px;
  background: var(--surface);
}

.metrics span {
  display: block;
  color: var(--color-cloud-white);
  font-family: var(--font-inconsolata);
  font-size: 26px;
  font-weight: 600;
}

.metrics small {
  color: var(--color-silken-whisper);
}

.grid-days {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.day-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(31, 31, 28, 0.74);
  box-shadow: var(--shadow);
}

.day-card h2 {
  font-size: 28px;
}

.day-meta,
.prescription,
.actions,
.history-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.day-meta span,
.prescription span,
.history-stats span {
  border: 1px solid var(--color-muted-ash);
  border-radius: var(--radius-control);
  padding: 6px 9px;
  background: rgba(40, 40, 40, 0.58);
  color: var(--color-silken-whisper);
  font-family: var(--font-inconsolata);
  font-size: 13px;
}

.primary,
.secondary,
.text-button {
  min-height: 42px;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-pill);
  padding: 0 16px;
  background: transparent;
  color: var(--color-cloud-white);
  cursor: pointer;
}

.primary {
  border-color: var(--accent);
  color: var(--color-cloud-white);
}

.primary:hover {
  background: rgba(250, 255, 105, 0.1);
  border-color: var(--color-emerald-glint);
  box-shadow: 0 0 0 3px rgba(250, 255, 105, 0.08);
}

.secondary {
  border-color: var(--color-border-light);
  color: var(--color-cloud-white);
}

.secondary:hover {
  background: var(--color-muted-ash);
}

.danger {
  border-color: var(--warn);
  color: var(--warn);
}

.text-button {
  min-height: auto;
  border: 0;
  border-radius: 0;
  padding: 0;
  color: var(--color-silken-whisper);
}

.text-button:hover {
  color: var(--accent);
}

.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.panel,
.toolbar-panel,
.notes-panel {
  padding: 24px;
}

.week-list,
.history-list {
  display: grid;
  gap: 10px;
}

.week-list div,
.history-list a,
.history-item {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-cool-stone);
}

.history-list a:hover strong {
  color: var(--accent);
}

.week-list span,
.history-list span {
  color: var(--muted);
}

.section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.month-nav {
  display: flex;
  gap: 8px;
}

.calendar-panel {
  margin-bottom: 18px;
}

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

.calendar-weekdays {
  margin-bottom: 7px;
  color: var(--color-silken-whisper);
  font-family: var(--font-inconsolata);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.calendar-cell {
  min-height: 74px;
  border: 1px solid var(--color-cool-stone);
  border-radius: var(--radius-control);
  padding: 8px;
  background: var(--color-deep-graphite);
  overflow: hidden;
}

.calendar-cell span {
  display: block;
  color: var(--color-silken-whisper);
  font-family: var(--font-inconsolata);
  font-size: 12px;
  font-weight: 600;
}

.calendar-cell small {
  display: block;
  margin-top: 8px;
  color: var(--color-cloud-white);
  font-size: 12px;
  line-height: 1.25;
}

.calendar-cell.blank {
  border-color: transparent;
  background: transparent;
}

.level-0 {
  background: var(--color-deep-graphite);
}

.level-1 {
  background: #333713;
  border-color: #555c1d;
}

.level-2 {
  background: #626b1d;
  border-color: #909a2b;
}

.level-3 {
  background: #a9b636;
  border-color: var(--accent);
}

.level-4 {
  background: var(--accent);
  border-color: var(--accent);
}

.level-3 small,
.level-3 span,
.level-4 small,
.level-4 span {
  color: var(--color-midnight-oil);
}

.calendar-legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}

.calendar-legend i {
  width: 18px;
  height: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
}

.exercise-list,
.set-table {
  display: grid;
  gap: 14px;
}

.exercise-card,
.track-exercise {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(31, 31, 28, 0.78);
  box-shadow: var(--shadow);
}

.exercise-card img,
.exercise-head img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--color-deep-graphite);
  filter: contrast(1.08) saturate(0.82) brightness(0.9);
}

.exercise-head {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 16px;
  align-items: center;
}

.track-exercise {
  grid-template-columns: 1fr;
}

.toolbar-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 14px;
  box-shadow: none;
}

label {
  display: grid;
  gap: 7px;
  color: var(--color-silken-whisper);
  font-size: 13px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-cool-stone);
  border-radius: var(--radius-control);
  padding: 11px 12px;
  background: var(--surface);
  color: var(--ink);
}

select {
  color-scheme: dark;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(250, 255, 105, 0.16);
  border-color: var(--accent);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-shadow-white);
}

.check-row {
  display: flex;
  align-items: center;
  align-self: end;
  min-height: 45px;
  flex-direction: row;
}

.check-row input,
.set-check input {
  width: auto;
}

.sets-grid {
  overflow-x: auto;
}

.set-labels,
.set-row {
  display: grid;
  grid-template-columns: 54px repeat(3, minmax(88px, 1fr)) 70px;
  gap: 8px;
  align-items: center;
  min-width: 460px;
}

.set-labels {
  margin: 16px 0 8px;
  color: var(--color-silken-whisper);
  font-family: var(--font-inconsolata);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.set-row {
  margin-bottom: 8px;
}

.set-row > span {
  color: var(--accent);
  font-family: var(--font-inconsolata);
  font-weight: 600;
}

.set-check {
  display: flex;
  justify-content: center;
}

.set-check span {
  display: block;
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-control);
  background: transparent;
}

.set-check input {
  position: absolute;
  opacity: 0;
}

.set-check input:checked + span {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(250, 255, 105, 0.08);
}

.notes-panel {
  margin-top: 14px;
  box-shadow: none;
}

.sticky-actions {
  position: sticky;
  bottom: 0;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 0;
  background: linear-gradient(180deg, rgba(21, 21, 21, 0), var(--bg) 35%);
}

.login-panel {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 34px;
  align-items: end;
  max-width: 860px;
  margin: 12vh auto 0;
  padding: 36px;
  overflow: hidden;
}

.form-stack {
  display: grid;
  gap: 14px;
}

.alert {
  border: 1px solid rgba(255, 117, 117, 0.44);
  border-radius: var(--radius-control);
  padding: 10px 12px;
  background: rgba(255, 117, 117, 0.08);
  color: var(--warn);
}

.empty {
  padding: 34px;
}

@media (max-width: 980px) {
  .grid-days,
  .two-column {
    grid-template-columns: 1fr 1fr;
  }

  .hero,
  .page-title,
  .login-panel {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .metrics {
    min-width: 0;
  }
}

@media (max-width: 700px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .shell {
    width: min(100% - 20px, 1180px);
    padding-top: 16px;
  }

  .hero,
  .page-title,
  .login-panel,
  .panel,
  .toolbar-panel,
  .notes-panel {
    padding: 20px;
  }

  .hero h1,
  .page-title h1,
  .login-panel h1,
  .empty h1 {
    font-size: 36px;
  }

  .grid-days,
  .two-column,
  .toolbar-panel,
  .exercise-card {
    grid-template-columns: 1fr;
  }

  .exercise-head {
    grid-template-columns: 84px 1fr;
  }

  .history-item,
  .section-head,
  .week-list div,
  .history-list a {
    flex-direction: column;
  }

  .calendar-weekdays,
  .calendar-grid {
    gap: 4px;
  }

  .calendar-cell {
    min-height: 56px;
    padding: 6px;
  }

  .calendar-cell small {
    display: none;
  }
}