/* RepReady – Variables & base */
:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface-hover: #242424;
  --border: #2d2d2d;
  --text: #f0f0f0;
  --text-muted: #9a9a9a;
  --accent: #00d4aa;
  --accent-hover: #00b894;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --danger: #ff6b6b;
  --radius: 12px;
  --radius-sm: 8px;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
}

/* Header */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 0.25rem;
}

.nav-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.nav-btn:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav-btn.active {
  color: var(--accent);
  background: var(--accent-dim);
}

/* Main */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2rem;
}

.view {
  display: block;
}

.view[hidden] {
  display: none !important;
}

/* Browse – controls */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
}

.search-wrap {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  opacity: 0.5;
  pointer-events: none;
}

.search-icon::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.search-icon::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 14px;
  width: 8px;
  height: 2px;
  background: currentColor;
  transform: rotate(-45deg);
}

.search {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search::placeholder {
  color: var(--text-muted);
}

.search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

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

.filter-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.filter-select {
  padding: 0.75rem 2rem 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  min-width: 160px;
  cursor: pointer;
}

.btn {
  padding: 0.75rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

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

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

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

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

.btn-icon {
  padding: 0.5rem;
  min-width: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-fav {
  background: transparent;
  color: var(--text-muted);
}

.btn-fav:hover,
.btn-fav.active {
  color: var(--danger);
}

.btn-fav.active {
  background: rgba(255, 107, 107, 0.1);
}

/* Loading & error */
.loading,
.error {
  text-align: center;
  padding: 2rem;
}

.loading p,
.error {
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.error {
  color: var(--danger);
  background: rgba(255, 107, 107, 0.08);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 107, 107, 0.2);
}

.spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Exercise list */
.exercise-list {
  display: grid;
  gap: 1rem;
}

.exercise-card {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 1.25rem;
  align-items: start;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, background 0.2s;
}

.exercise-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.exercise-card-image {
  width: 120px;
  height: 90px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--bg);
}

.exercise-card-image.placeholder {
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-muted);
}

.exercise-card-body {
  min-width: 0;
}

.exercise-card-name {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.exercise-card-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.exercise-card-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-end;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.pagination button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.pagination button:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Workout & Favorites views */
.workout-header,
.view-favorites h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
}

.workout-progress {
  margin-bottom: 1rem;
}

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.25rem;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s;
}

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

.saved-list {
  display: grid;
  gap: 1rem;
}

.saved-list .exercise-card {
  grid-template-columns: 100px 1fr auto;
}

.saved-list .exercise-card-image {
  width: 100px;
  height: 75px;
}

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

.empty-state[hidden] {
  display: none;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal[hidden] {
  display: none !important;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  cursor: pointer;
}

.modal-content {
  position: relative;
  max-width: 560px;
  max-height: 85vh;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--surface-hover);
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s;
}

.modal-close:hover {
  background: var(--border);
}

.modal-content .exercise-detail-image {
  width: 100%;
  max-height: 240px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: var(--bg);
  margin-bottom: 1rem;
}

.modal-content .exercise-detail-name {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
}

.modal-content .exercise-detail-desc {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  white-space: pre-wrap;
}

/* Responsive */
@media (max-width: 640px) {
  .exercise-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .exercise-card-image {
    width: 100%;
    height: 160px;
  }

  .exercise-card-actions {
    flex-direction: row;
    justify-content: flex-start;
  }

  .saved-list .exercise-card {
    grid-template-columns: 80px 1fr;
    grid-template-rows: auto auto;
  }

  .saved-list .exercise-card-image {
    width: 80px;
    height: 60px;
    grid-row: span 2;
  }

  .saved-list .exercise-card-actions {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }
}