/* ═══════════════════════════════════════════════════════════════════
   GOTHAR GYM - Playful Light Theme
   Design System: OAM Playful Flavor
   ═══════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────
   Design Tokens
   ───────────────────────────────────────────────────────────────────── */
:root {
  /* Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f5f5f5;
  --text-primary: #171717;
  --text-secondary: #525252;
  --text-muted: #a3a3a3;

  /* Brand */
  --brand-primary: #2563eb;
  --brand-hover: #1d4ed8;
  --brand-light: rgba(37, 99, 235, 0.1);

  /* Semantic */
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.1);

  /* Training Types */
  --cardio: #ef4444;
  --strength: #3b82f6;
  --flexibility: #10b981;
  --endurance: #8b5cf6;

  /* Playful Motion */
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;

  /* Sharp Shadows (Playful) */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.12);
  --shadow-base: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.22);
  --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.06);

  /* Rounded Corners */
  --radius-sm: 0.5rem;    /* 8px */
  --radius-md: 0.75rem;   /* 12px - buttons, inputs */
  --radius-lg: 1rem;      /* 16px - cards */
  --radius-full: 9999px;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;

  /* Layout */
  --nav-height: 60px;
  --bottom-nav-height: 64px;
  --max-width: 480px;
}

/* ─────────────────────────────────────────────────────────────────────
   Base Reset
   ───────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-secondary);
  min-height: 100vh;
  min-height: 100dvh;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font: inherit;
}

/* ─────────────────────────────────────────────────────────────────────
   Top Bar
   ───────────────────────────────────────────────────────────────────── */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 var(--space-md);
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--brand-primary);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
}

.avatar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.avatar-btn:hover {
  background: var(--brand-light);
  color: var(--brand-primary);
  transform: scale(1.05);
}

/* ─────────────────────────────────────────────────────────────────────
   Bottom Navigation
   ───────────────────────────────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: var(--bottom-nav-height);
  background: var(--bg-primary);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 64px;
  padding: var(--space-sm);
  color: var(--text-muted);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.nav-item:hover,
.nav-item.active {
  color: var(--brand-primary);
}

.nav-item.active {
  transform: translateY(-2px);
}

.nav-item.primary {
  position: relative;
  color: var(--bg-primary);
  background: var(--brand-primary);
  border-radius: var(--radius-full);
  margin-top: -20px;
  width: 56px;
  height: 56px;
  box-shadow: var(--shadow-base);
}

.nav-item.primary:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.nav-label {
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-item.primary .nav-label {
  display: none;
}

/* ─────────────────────────────────────────────────────────────────────
   Main Content
   ───────────────────────────────────────────────────────────────────── */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md);
}

main.with-nav {
  padding-bottom: calc(var(--bottom-nav-height) + var(--space-xl));
}

/* ─────────────────────────────────────────────────────────────────────
   Cards
   ───────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-base);
  padding: var(--space-lg);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ─────────────────────────────────────────────────────────────────────
   Buttons
   ───────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  height: 48px;
  padding: 0 var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.btn-primary {
  background: var(--brand-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--brand-hover);
  transform: scale(1.02) translateY(-1px);
  box-shadow: var(--shadow-base);
}

.btn-primary:active {
  transform: scale(0.97);
}

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

.btn-secondary:hover {
  background: var(--bg-secondary);
  transform: scale(1.02);
}

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

.btn-danger:hover {
  background: var(--danger);
  filter: brightness(0.9);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* ─────────────────────────────────────────────────────────────────────
   Forms
   ───────────────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-select {
  display: block;
  width: 100%;
  height: 48px;
  padding: 0 var(--space-md);
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 2px solid var(--bg-tertiary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--brand-light);
}

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

/* ─────────────────────────────────────────────────────────────────────
   Auth Pages
   ───────────────────────────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-light) 0%, var(--bg-primary) 100%);
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: var(--space-lg);
}

.auth-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xl);
}

.auth-logo {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: var(--space-md);
  color: var(--text-primary);
}

.auth-form {
  margin-bottom: var(--space-lg);
}

.auth-submit {
  width: 100%;
  margin-top: var(--space-md);
}

.auth-switch {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.auth-link {
  color: var(--brand-primary);
  font-weight: 600;
}

.auth-link:hover {
  text-decoration: underline;
}

.error-message {
  padding: var(--space-md);
  background: var(--danger-light);
  color: var(--danger);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

/* ─────────────────────────────────────────────────────────────────────
   Dashboard
   ───────────────────────────────────────────────────────────────────── */
.dashboard {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.dashboard-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

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

.section-link {
  font-size: 0.875rem;
  color: var(--brand-primary);
  font-weight: 500;
}

/* ─────────────────────────────────────────────────────────────────────
   Stat Cards
   ───────────────────────────────────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.stat-grid--full {
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
}

.stat-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-bounce);
}

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

.stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card--success .stat-value {
  color: var(--success);
}

/* ─────────────────────────────────────────────────────────────────────
   Streak Card
   ───────────────────────────────────────────────────────────────────── */
.streak-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-base);
  padding: var(--space-lg);
}

.streak-card.on-fire {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.streak-icon {
  flex-shrink: 0;
}

.streak-text {
  display: flex;
  flex-direction: column;
}

.streak-days {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.streak-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ─────────────────────────────────────────────────────────────────────
   Session Cards
   ───────────────────────────────────────────────────────────────────── */
.session-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.session-card {
  display: block;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.session-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-base);
}

.session-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.session-date {
  font-weight: 600;
  color: var(--text-primary);
}

.session-type {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  color: white;
}

.session-type--interval { background: var(--cardio); }
.session-type--strength { background: var(--strength); }
.session-type--endurance { background: var(--endurance); }
.session-type--emom { background: var(--flexibility); }

.session-stats {
  display: flex;
  gap: var(--space-lg);
}

.session-stat {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.session-volume {
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────────────────────────────
   Workout Wizard
   ───────────────────────────────────────────────────────────────────── */
.workout-wizard {
  min-height: calc(100vh - var(--nav-height) - var(--bottom-nav-height));
}

.wizard-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.wizard-progress {
  text-align: center;
}

.wizard-step-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.progress-bar {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--brand-primary);
  transition: width var(--duration-slow) var(--ease-bounce);
}

.wizard-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.wizard-title {
  font-size: 1.25rem;
  font-weight: 700;
  text-align: center;
}

.wizard-nav {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.wizard-nav .btn {
  flex: 1;
}

/* Type Selection Grid */
.type-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.type-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--bg-primary);
  border: 2px solid var(--bg-tertiary);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.type-card:hover {
  border-color: var(--brand-primary);
  transform: scale(1.02);
  box-shadow: var(--shadow-base);
}

.type-name {
  font-weight: 600;
  color: var(--text-primary);
}

.type-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Exercise Input */
.exercise-input-card {
  background: var(--bg-primary);
  border: 2px solid var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}

.exercise-header {
  display: grid;
  grid-template-columns: 1fr 100px;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.exercise-rounds {
  display: flex;
  gap: var(--space-sm);
}

.round-input {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.round-label {
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--text-muted);
}

.round-reps {
  width: 48px;
  text-align: center;
}

.add-exercise-btn {
  width: 100%;
}

/* Intensity Slider */
.intensity-slider {
  padding: var(--space-lg);
}

.slider {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  appearance: none;
  outline: none;
}

.slider::-webkit-slider-thumb {
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--brand-primary);
  cursor: pointer;
  box-shadow: var(--shadow-base);
  transition: transform var(--duration-fast) var(--ease-bounce);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.intensity-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────────────────────────────
   History Page
   ───────────────────────────────────────────────────────────────────── */
.history-page {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

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

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  text-align: center;
  color: var(--text-muted);
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.empty-text {
  font-size: 0.875rem;
}

/* ─────────────────────────────────────────────────────────────────────
   Stats Page
   ───────────────────────────────────────────────────────────────────── */
.stats-page {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.stats-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.empty-chart {
  padding: var(--space-xl);
  text-align: center;
  color: var(--text-muted);
}

/* Records List */
.records-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.record-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.record-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--warning-light);
  color: var(--warning);
  border-radius: var(--radius-md);
}

.record-details {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.record-exercise {
  font-weight: 600;
}

.record-value {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.record-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────────────────────────────
   Charts
   ───────────────────────────────────────────────────────────────────── */
.chart-container {
  position: relative;
  width: 100%;
}

.chart-container--large {
  height: 200px;
}

.chart-container--doughnut {
  max-width: 280px;
  margin: 0 auto;
}

/* ─────────────────────────────────────────────────────────────────────
   Loading States
   ───────────────────────────────────────────────────────────────────── */
.spinner {
  display: inline-flex;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spinner-arc {
  animation: dash 1.5s ease-in-out infinite;
}

@keyframes dash {
  0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; }
  50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; }
  100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

.skeleton--rounded {
  border-radius: var(--radius-full);
}

.skeleton-line {
  height: 1rem;
  margin-bottom: var(--space-sm);
}

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

.session-card--skeleton {
  padding: var(--space-lg);
}

.infinite-trigger {
  display: flex;
  justify-content: center;
  padding: var(--space-lg);
}

/* HTMX Indicator */
.htmx-indicator {
  display: none;
}

.htmx-request .htmx-indicator {
  display: inline-flex;
}

.htmx-request .btn-text {
  opacity: 0.5;
}

/* ─────────────────────────────────────────────────────────────────────
   FAB (Floating Action Button)
   ───────────────────────────────────────────────────────────────────── */
.fab {
  position: fixed;
  right: var(--space-lg);
  bottom: calc(var(--bottom-nav-height) + var(--space-lg));
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--brand-primary);
  color: white;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  transition: all var(--duration-normal) var(--ease-bounce);
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.35);
}

.fab:active {
  transform: scale(0.95);
}

/* ─────────────────────────────────────────────────────────────────────
   Review Section
   ───────────────────────────────────────────────────────────────────── */
.review-card {
  background: var(--bg-primary);
  border: 2px solid var(--bg-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.review-header {
  display: flex;
  justify-content: space-between;
  padding: var(--space-md);
  background: var(--brand-light);
}

.review-type {
  font-weight: 700;
  color: var(--brand-primary);
  text-transform: capitalize;
}

.review-rounds {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.review-exercises {
  padding: var(--space-md);
}

.review-exercise {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--bg-tertiary);
}

.review-exercise:last-child {
  border-bottom: none;
}

.review-ex-name {
  font-weight: 500;
}

.review-ex-weight {
  color: var(--text-secondary);
}

.review-ex-reps {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.review-empty {
  text-align: center;
  color: var(--text-muted);
  padding: var(--space-lg);
}

.review-summary {
  padding: var(--space-md);
  background: var(--bg-secondary);
  font-weight: 600;
  text-align: center;
}

/* ─────────────────────────────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────────────────────────────── */
@media (min-width: 640px) {
  main {
    padding: var(--space-xl);
  }

  .stat-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .type-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}