/* ============================================
   NAVIGATION
   ============================================ */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(250, 249, 247, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: 100;
  transition: background var(--duration-normal) var(--ease-out);
}

@media (prefers-color-scheme: dark) {
  .main-nav {
    background: rgba(19, 19, 18, 0.85);
  }
}

[data-theme="dark"] .main-nav {
  background: rgba(19, 19, 18, 0.85);
}

[data-theme="light"] .main-nav {
  background: rgba(250, 249, 247, 0.85);
}

.nav-logo {
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-1);
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.nav-links a:hover {
  color: var(--color-text-primary);
  background: var(--color-panel-hover);
}

.nav-links a.active {
  color: var(--color-accent-primary);
}

/* Nav User Section */
.nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.nav-username {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.nav-logout {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-logout:hover {
  color: var(--color-text-primary);
  background: var(--color-panel-hover);
}

/* ============================================
   CARDS - Borderless with shadow elevation
   ============================================ */
.card {
  background: var(--color-panel);
  border-radius: var(--radius-lg);
  padding: var(--density-card-padding);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lifted);
}

/* ============================================
   STAT CARDS
   ============================================ */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (min-width: 600px) {
  .stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  background: var(--color-panel);
  border-radius: var(--radius-lg);
  padding: var(--density-card-padding);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
}

.stat-card .stat-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.stat-card .stat-value {
  display: block;
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

/* ============================================
   FILTER BAR & TABS - Pill style
   ============================================ */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.filter-tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-bg);
  border-radius: var(--radius-full);
  padding: var(--space-1);
}

.filter-tab {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.filter-tab:hover {
  color: var(--color-text-primary);
}

.filter-tab.active {
  background: var(--color-text-primary);
  color: var(--color-bg);
}

/* View Toggle (grid/list) */
.view-toggle {
  display: flex;
  gap: var(--space-1);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: var(--space-1);
}

.view-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: calc(var(--radius-sm) - 2px);
  color: var(--color-text-tertiary);
  transition: all var(--duration-fast) var(--ease-out);
}

.view-toggle-btn:hover {
  color: var(--color-text-secondary);
}

.view-toggle-btn.active {
  background: var(--color-panel);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-xs);
}

/* Time Range Select */
.time-range-select {
  padding: var(--space-2) var(--space-3);
  padding-right: var(--space-6);
  font-size: var(--text-sm);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.time-range-select:hover {
  border-color: var(--color-text-tertiary);
}

.time-range-select:focus {
  outline: none;
  border-color: var(--color-accent-primary);
}

/* ============================================
   WORKOUT CARDS
   ============================================ */
.workout-card {
  display: block;
  background: var(--color-panel);
  border-radius: var(--radius-lg);
  padding: var(--density-card-padding);
  margin-bottom: var(--density-item-gap);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.workout-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lifted);
}

.workout-card.accent-bike {
  position: relative;
}

.workout-card.accent-bike::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-4);
  bottom: var(--space-4);
  width: 3px;
  background: var(--color-accent-bike);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.workout-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.workout-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  font-size: 18px;
}

.workout-card-title {
  flex: 1;
  min-width: 0;
}

.workout-card-title h3 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.workout-card-date {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.workout-card-time {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}

.workout-card-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Grid view for workouts */
.workout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}

.workout-grid .workout-card {
  margin-bottom: 0;
}

/* ============================================
   METRIC PILLS
   ============================================ */
.metric-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  font-variant-numeric: tabular-nums;
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
}

/* ============================================
   MONTH SECTION
   ============================================ */
.month-section {
  margin-bottom: var(--density-section-gap);
}

.month-section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-4);
  padding-left: var(--space-1);
}

/* ============================================
   LOADING STATES
   ============================================ */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  color: var(--color-text-secondary);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--space-4);
}

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

/* Skeleton Loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 0%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  height: 100px;
  margin-bottom: var(--density-item-gap);
}

.skeleton-stat {
  height: 90px;
}

@media (prefers-color-scheme: dark) {
  .skeleton {
    background: linear-gradient(
      90deg,
      var(--color-gray-700) 0%,
      var(--color-gray-800) 50%,
      var(--color-gray-700) 100%
    );
    background-size: 200% 100%;
  }
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
  text-align: center;
  padding: var(--space-8);
  color: var(--color-text-secondary);
}

.empty-state p {
  font-size: var(--text-base);
}

/* ============================================
   DETAIL VIEW
   ============================================ */
.detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.back-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-panel);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

.back-link:hover {
  color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.detail-map {
  height: 280px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-6);
  background: var(--color-panel);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 600px) {
  .detail-map {
    height: 380px;
  }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-primary {
  background: var(--color-accent-primary);
  color: white;
  border: none;
}

.btn-primary:hover {
  background: var(--color-accent-primary-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-tertiary);
  background: var(--color-panel-hover);
}

/* Delete Button */
.delete-btn {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-danger);
  background: transparent;
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.delete-btn:hover {
  background: var(--color-danger);
  color: white;
}

.delete-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Export Buttons */
.export-buttons {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.export-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: var(--color-panel);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.export-btn:hover {
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.export-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.export-btn svg {
  flex-shrink: 0;
}

/* ============================================
   CHARTS
   ============================================ */
.chart-card {
  margin-top: var(--space-6);
}

.chart-card h3 {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.chart-container {
  height: 200px;
}

.chart-container svg,
.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* Map Legend */
.map-legend {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-panel);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-xs);
}

.legend-label {
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.legend-gradient {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
}

.legend-slow,
.legend-fast {
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
}

.legend-bar {
  flex: 1;
  height: 6px;
  border-radius: var(--radius-full);
  background: linear-gradient(to right, hsl(0, 70%, 50%), hsl(60, 70%, 50%), hsl(120, 70%, 45%));
}

/* ============================================
   LOGIN VIEW
   ============================================ */
.login-view {
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.login-card {
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.login-header {
  margin-bottom: var(--space-7);
}

.login-header h1 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-2);
}

.login-header p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
}

.login-error {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--color-danger);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
}

/* Auth Buttons */
.strava-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: #fc4c02;
  color: white;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.strava-btn:hover {
  background: #e34402;
  transform: translateY(-1px);
}

.strava-btn svg {
  flex-shrink: 0;
}

.apple-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-text-primary);
  color: var(--color-bg);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.apple-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.apple-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.apple-btn svg {
  flex-shrink: 0;
}

/* Login Divider */
.login-divider {
  display: flex;
  align-items: center;
  margin: var(--space-5) 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.login-divider::before,
.login-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.login-divider span {
  padding: 0 var(--space-4);
}

/* Email Form */
.email-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.email-form input[type="email"] {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-base);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.email-form input[type="email"]:focus {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px var(--color-accent-primary-subtle);
}

.email-form input[type="email"]::placeholder {
  color: var(--color-text-tertiary);
}

.email-btn {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  background: var(--color-accent-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.email-btn:hover {
  background: var(--color-accent-primary-hover);
  transform: translateY(-1px);
}

.email-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Email Sent Icon */
.email-sent-icon {
  display: flex;
  justify-content: center;
  margin: var(--space-6) 0;
  color: var(--color-success);
}

/* Secondary Button */
.secondary-btn {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  margin-top: var(--space-5);
}

.secondary-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-tertiary);
}

.login-note {
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: var(--leading-relaxed);
}

/* ============================================
   THEME TOGGLE
   ============================================ */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: var(--space-1);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: calc(var(--radius-sm) - 2px);
  color: var(--color-text-tertiary);
  transition: all var(--duration-fast) var(--ease-out);
}

.theme-toggle-btn:hover {
  color: var(--color-text-secondary);
}

.theme-toggle-btn.active {
  background: var(--color-panel);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-xs);
}

/* ============================================
   SETTINGS PANEL
   ============================================ */
.settings-section {
  margin-bottom: var(--space-6);
}

.settings-section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-3);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
}

.settings-row + .settings-row {
  border-top: 1px solid var(--color-border-subtle);
}

.settings-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

/* Color Swatches for accent picker */
.accent-picker {
  display: flex;
  gap: var(--space-2);
}

.accent-swatch {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.accent-swatch:hover {
  transform: scale(1.1);
}

.accent-swatch.active {
  border-color: var(--color-text-primary);
}

.accent-swatch--orange { background: #d97757; }
.accent-swatch--blue { background: #3b82f6; }
.accent-swatch--green { background: #22c55e; }
.accent-swatch--purple { background: #8b5cf6; }

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 640px) {
  .main-nav {
    padding: 0 var(--space-4);
  }

  main {
    padding: var(--space-4);
    padding-top: calc(72px + var(--space-4));
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .filter-tabs {
    justify-content: center;
  }

  .nav-username {
    display: none;
  }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .skeleton {
    animation: none;
    background: var(--color-gray-200);
  }
}