:root {
  --bg: #050614;
  --surface: rgba(16, 22, 40, 0.92);
  --surface-soft: rgba(26, 34, 58, 0.86);
  --surface-bold: rgba(32, 41, 68, 0.78);
  --text: #f8fafc;
  --text-soft: #cbd5f5;
  --text-faint: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --warning: #facc15;
  --success: #34d399;
  --border: rgba(148, 163, 184, 0.35);
  --danger: #f87171;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.18), transparent 52%), var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 600;
  color: inherit;
}

p {
  margin: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

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

button {
  cursor: pointer;
}

button,
select {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: rgba(148, 163, 184, 0.12);
  padding: 0.45rem 0.9rem;
  transition: border 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

button:hover,
select:hover {
  background: rgba(148, 163, 184, 0.22);
}

button:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.4);
}

button.ghost {
  background: transparent;
}

button.ghost.small {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

button.accent {
  background: var(--accent);
  border-color: transparent;
  color: #030712;
  font-weight: 600;
}

button.accent:hover {
  filter: brightness(1.1);
}

textarea {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: rgba(9, 13, 28, 0.7);
  padding: 0.65rem 0.8rem;
  resize: vertical;
  color: inherit;
}

.app-header {
  padding: 1.25rem clamp(1rem, 5vw, 3.2rem) 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  background: linear-gradient(140deg, rgba(56, 189, 248, 0.22), transparent 62%);
  border-bottom: 1px solid var(--border);
}

.app-header .title-area {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.subtitle {
  color: var(--text-faint);
  font-size: 0.92rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-faint);
}

.layout {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  padding: 1.4rem clamp(1rem, 5vw, 3.2rem) 2rem;
}

.day-navigation {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  background: var(--surface);
  padding: 1rem;
  border-radius: 1.1rem;
  border: 1px solid var(--border);
}

.day-nav-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

.day-list {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.4rem;
  scrollbar-width: thin;
}

.day-button {
  flex: 0 0 auto;
  min-width: 150px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: rgba(148, 163, 184, 0.12);
  border-radius: 0.9rem;
  padding: 0.65rem 0.9rem;
}

.day-button-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  align-items: flex-start;
}

.day-button span {
  color: var(--text-faint);
  font-size: 0.8rem;
}

.day-button.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.45);
  background: rgba(56, 189, 248, 0.18);
}

.progress-pill {
  background: rgba(34, 197, 94, 0.18);
  color: var(--success);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.day-view {
  background: var(--surface-soft);
  border-radius: 1.1rem;
  border: 1px solid var(--border);
  padding: 1.3rem;
}

.day-headline {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}

.blocks {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.exercise-card,
.group-item-card {
  background: var(--surface);
  border-radius: 1.1rem;
  border: 1px solid rgba(56, 189, 248, 0.16);
  padding: 1.05rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.exercise-card-header {
  display: grid;
  grid-template-columns: minmax(0, 110px) minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.exercise-media {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.media-thumb {
  border-radius: 0.9rem;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(4, 6, 16, 0.55);
  display: grid;
  place-items: center;
  min-height: 120px;
  overflow: hidden;
  /* Keep media contained and predictable */
  aspect-ratio: 1 / 1;
}

.media-thumb.loading {
  animation: pulse 1.6s ease-in-out infinite;
}

.media-thumb img,
.media-thumb video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.media-placeholder {
  font-size: 0.85rem;
  color: var(--text-faint);
}

.exercise-info {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.exercise-title-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.exercise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.exercise-tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.18);
  border: 1px solid rgba(148, 163, 184, 0.28);
  color: var(--text-faint);
}

.exercise-plan {
  font-size: 0.9rem;
  color: var(--text-soft);
}

.exercise-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}

.summary-pill {
  background: rgba(12, 17, 34, 0.75);
  border: 1px solid rgba(56, 189, 248, 0.12);
  border-radius: 0.85rem;
  padding: 0.55rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.summary-pill span {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.summary-pill strong {
  font-size: 1.05rem;
  font-weight: 600;
}

.rest-timer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 0.9rem;
  padding: 0.6rem 0.75rem;
  gap: 0.75rem;
}

.rest-label {
  font-size: 0.82rem;
  color: var(--text-faint);
}

.rest-display {
  font-weight: 600;
  color: var(--accent);
  min-width: 56px;
  text-align: center;
}

.rest-controls {
  display: flex;
  gap: 0.5rem;
}

.exercise-notes label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-faint);
}

.set-table {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.set-row {
  display: grid;
  grid-template-columns: 0.6fr 1.4fr repeat(3, 1fr) 0.7fr;
  gap: 0.45rem;
  align-items: center;
}

.set-row.set-header {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

.set-cell {
  display: flex;
  align-items: center;
}

.set-previous {
  color: var(--text-soft);
  font-size: 0.88rem;
}

.set-value {
  width: 100%;
  background: rgba(13, 18, 32, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 0.75rem;
  padding: 0.55rem 0.65rem;
  justify-content: center;
  color: inherit;
}

.set-value:hover {
  background: rgba(56, 189, 248, 0.12);
}

.set-complete {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.6);
  font-size: 1rem;
}

.set-complete.checked {
  background: rgba(34, 197, 94, 0.22);
  border-color: rgba(34, 197, 94, 0.4);
  color: var(--success);
}

.set-controls-row {
  display: flex;
  justify-content: flex-start;
}

.group-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: rgba(14, 19, 35, 0.75);
  border-radius: 1.1rem;
  border: 1px solid rgba(148, 163, 184, 0.28);
  padding: 1rem 1.1rem;
}

.group-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.group-card-description {
  color: var(--text-soft);
  font-size: 0.9rem;
}

.note-block {
  background: rgba(250, 204, 21, 0.12);
  border-radius: 1rem;
  border: 1px solid rgba(250, 204, 21, 0.28);
  padding: 0.95rem 1.1rem;
}

.note-title {
  font-weight: 600;
  color: var(--warning);
  margin-bottom: 0.45rem;
}

.text-block {
  background: rgba(15, 23, 42, 0.6);
  border-radius: 1rem;
  border: 1px solid rgba(148, 163, 184, 0.18);
  padding: 0.95rem 1.1rem;
  color: var(--text-soft);
}

.reference {
  background: var(--surface);
  border-radius: 1.1rem;
  border: 1px solid var(--border);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.reference details {
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 0.85rem;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.55);
}

.reference summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
}

.reference-content {
  margin-top: 0.7rem;
  color: var(--text-soft);
  line-height: 1.6;
}

.error {
  text-align: center;
  color: var(--text-faint);
  padding: 2rem 1rem;
}

.app-footer {
  margin-top: auto;
  padding: 1rem clamp(1rem, 5vw, 3.2rem);
  border-top: 1px solid var(--border);
  background: rgba(7, 10, 22, 0.85);
  color: var(--text-faint);
  font-size: 0.85rem;
  text-align: center;
}

/* Overlays */
#overlay-root {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
  z-index: 40;
}

.overlay:not(.hidden) {
  pointer-events: auto;
}

.overlay.hidden {
  visibility: hidden;
  opacity: 0;
}

.overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.65);
}

.overlay-sheet {
  position: relative;
  width: min(500px, 100%);
  background: var(--surface);
  border-radius: 1.4rem 1.4rem 0 0;
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 1.1rem 1.25rem 1.4rem;
  box-shadow: 0 -20px 40px rgba(2, 6, 23, 0.5);
  max-height: 85vh;
  overflow: auto;
}

.keypad-sheet {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.keypad-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.keypad-label {
  font-size: 0.9rem;
  color: var(--text-soft);
}

.keypad-meta {
  font-size: 0.75rem;
  color: var(--text-faint);
}

.keypad-display {
  font-size: 2.4rem;
  font-weight: 600;
  text-align: center;
  background: rgba(9, 13, 28, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 1rem;
  padding: 0.9rem 0;
}

.keypad-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.keypad-grid button {
  font-size: 1.4rem;
  padding: 0.85rem 0;
  border-radius: 0.8rem;
}

.keypad-grid .key-wide {
  grid-column: span 2;
}

.keypad-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}

.keypad-actions button {
  font-weight: 600;
}

.rir-sheet {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}

.rir-sheet .close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.85rem;
}

.rir-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.rir-title {
  font-size: 1rem;
  font-weight: 600;
}

.rir-subtitle {
  font-size: 0.85rem;
  color: var(--text-faint);
}

.rir-value {
  font-size: 2.6rem;
  font-weight: 700;
  text-align: center;
}

.rir-caption {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.rir-options {
  display: flex;
  justify-content: space-between;
  gap: 0.4rem;
}

.rir-options button {
  flex: 1;
  padding: 0.65rem 0;
  border-radius: 0.8rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(9, 13, 28, 0.6);
}

.rir-options button.active {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.18);
  color: var(--accent);
}

.rir-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.65rem;
}

@keyframes pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

@media (max-width: 720px) {
  .layout {
    padding: 1rem;
  }
  /* Wider aspect when media goes full width */
  .media-thumb {
    aspect-ratio: 16 / 9;
  }
  .day-navigation {
    position: sticky;
    top: 0.5rem;
    z-index: 5;
  }
  .exercise-card-header {
    grid-template-columns: 1fr;
  }
  .exercise-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .set-row {
    grid-template-columns: 0.5fr 1.2fr 1fr 1fr 1fr 0.5fr;
    font-size: 0.95rem;
  }
  .set-value {
    padding: 0.5rem;
  }
}

@media (min-width: 1024px) {
  .layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr) 310px;
    grid-template-areas: 'nav content reference';
  }
  .day-navigation {
    grid-area: nav;
    position: sticky;
    top: 1.2rem;
  }
  .day-view {
    grid-area: content;
  }
  .reference {
    grid-area: reference;
    position: sticky;
    top: 1.2rem;
    max-height: calc(100vh - 2.4rem);
    overflow-y: auto;
  }
}