@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #faf6ee; /* Warm cream paper canvas background */
  --panel-bg: #ffffff; /* Solid white card background */
  --border-color: #e8dfd3; /* Terracotta-tinted structural borders */
  --item-hover: #fcfaf6;
  
  --text-primary: #26231e; /* High-contrast warm charcoal ink */
  --text-secondary: #5c574f; /* Clay-grey body text */
  --text-muted: #968f84; /* Quiet warm grey ink */
  
  --color-primary: #b8422e; /* Burnt Terracotta accent */
  --color-primary-dark: #8a2c1d;
  --color-primary-light: rgba(184, 66, 46, 0.05);
  
  /* State Colors - Desaturated pastels for visual comfort */
  --color-prep-bg: #eff6f6;
  --color-prep-border: #4a7c7c;
  --color-prep-text: #234545;
  
  --color-hold-bg: #f3f6ea;
  --color-hold-border: #708546;
  --color-hold-text: #455428;
  
  --color-relax-bg: #fdf1eb;
  --color-relax-border: #b8422e;
  --color-relax-text: #7a2617;
  
  --color-success-bg: #f3f6ea;
  --color-success-border: #708546;
  --color-danger: #b91c1c;
  
  --font-display: 'Lora', Georgia, serif;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-smooth: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  --border-radius-lg: 8px; /* Crisp human card geometry */
  --border-radius-md: 6px;
  --border-radius-sm: 4px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  
  /* Safe Area Support */
  padding-top: max(1.5rem, env(safe-area-inset-top));
  padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
}

/* Accessibility Focus States */
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

header {
  width: 100%;
  max-width: 800px;
  padding: 1.5rem 1rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  z-index: 10;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: white;
  stroke-width: 2.2;
}

h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.header-actions {
  display: flex;
  gap: 0.75rem;
}

/* Common Button Styles */
.btn-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background: var(--panel-bg);
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.btn-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Layout Containers */
main {
  width: 100%;
  max-width: 800px;
  padding: 0 0.5rem 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.view-section {
  display: none;
  width: 100%;
  animation: fadeIn 0.2s ease-out;
}

.view-section.active {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* CARDS */
.dashboard-card,
.player-card,
.completion-card,
.settings-exercise-card,
.settings-global-card {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.welcome-msg h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.welcome-msg p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 65ch;
  text-wrap: pretty;
}

.exercise-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.exercise-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius-md);
  transition: var(--transition-smooth);
}

.exercise-preview-container {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exercise-preview-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--border-radius-md);
  display: block;
}

.exercise-num-badge {
  position: absolute;
  top: -8px;
  left: -8px;
  width: 22px;
  height: 22px;
  background: var(--color-primary);
  color: white;
  font-family: var(--font-main);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--panel-bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.exercise-info {
  flex: 1;
}

.exercise-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.exercise-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.start-session-btn {
  width: 100%;
  padding: 1.25rem;
  border-radius: var(--border-radius-sm);
  background: var(--color-primary);
  color: white;
  border: none;
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.start-session-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* PLAYER CARD */
.player-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.active-ex-details {
  flex: 1;
}

.active-ex-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
  text-wrap: balance;
}

.active-ex-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 60ch;
  text-wrap: pretty;
}

.quit-session-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.quit-session-btn:hover {
  color: var(--color-danger);
  border-color: var(--color-danger);
  background: rgba(185, 28, 28, 0.02);
}

.quit-session-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* Interactive Workout Board */
.workout-board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  padding: 0.5rem 0;
}

.visual-timer-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  max-width: 240px;
  margin: 0 auto;
}

.timer-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer-circle-bg {
  fill: none;
  stroke: var(--border-color);
  stroke-width: 2.5; /* Ultra thin stopwatch line */
}

.timer-circle-progress {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2.5;
  stroke-linecap: square;
  transition: stroke-dashoffset 0.1s linear, stroke 0.2s ease;
  stroke-dasharray: 283;
  stroke-dashoffset: 0;
}

.timer-content {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
}

.state-label {
  font-family: var(--font-main);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  transition: var(--transition-smooth);
}

.time-countdown {
  font-family: var(--font-main);
  font-size: 5rem;
  font-weight: 800;
  line-height: 0.9;
  color: var(--text-primary);
  font-feature-settings: "tnum";
}

.leg-indicator {
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius-sm);
  background: var(--bg-primary);
  margin-top: 0.5rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Diagram Panel */
.diagram-panel {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.diagram-image {
  width: 100%;
  height: 100%;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-image svg,
.exercise-illustration-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--border-radius-sm);
  display: block;
}

/* Workout Stats and Rep Tracking */
.player-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* Giant Controls */
.player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.btn-control-secondary {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--panel-bg);
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.btn-control-secondary svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.btn-control-main {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.btn-control-main svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

/* STATE STYLES FOR THE TIMER BOARD - Opaque Warm Pastels */
.state-PREPARE {
  background-color: var(--color-prep-bg);
  border-color: var(--color-prep-border);
}
.state-PREPARE .timer-circle-progress {
  stroke: var(--color-prep-border);
}
.state-PREPARE .state-label {
  color: var(--color-prep-text);
}

.state-HOLD {
  background-color: var(--color-hold-bg);
  border-color: var(--color-hold-border);
}
.state-HOLD .timer-circle-progress {
  stroke: var(--color-hold-border);
}
.state-HOLD .state-label {
  color: var(--color-hold-text);
}

.state-RELAX {
  background-color: var(--color-relax-bg);
  border-color: var(--color-relax-border);
}
.state-RELAX .timer-circle-progress {
  stroke: var(--color-relax-border);
}
.state-RELAX .state-label {
  color: var(--color-relax-text);
}

/* COMPLETION VIEW */
.completion-icon {
  width: 80px;
  height: 80px;
  background: var(--color-success-bg);
  border: 1.5px solid var(--color-success-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-hold-text);
}

.completion-icon svg {
  width: 40px;
  height: 40px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
}

.completion-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.completion-card p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 460px;
}

.completion-actions {
  display: flex;
  gap: 1rem;
  width: 100%;
  max-width: 380px;
  margin-top: 1rem;
}

/* SETTINGS VIEW */
.settings-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.settings-header h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.settings-exercise-card {
  padding: 1.75rem 2rem;
}

.settings-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.settings-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.settings-row {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  align-items: center;
  gap: 1rem;
}

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

.control-stepper {
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 0.25rem;
  justify-content: space-between;
  width: 100%;
  max-width: 300px;
}

.btn-step {
  width: 54px;
  height: 54px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background: var(--panel-bg);
  color: var(--color-primary);
  font-size: 1.4rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.btn-step:active {
  transform: scale(0.92);
}

.stepper-value {
  font-size: 1.3rem;
  font-weight: 700;
  min-width: 60px;
  text-align: center;
  color: var(--text-primary);
  font-feature-settings: "tnum";
}

.stepper-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 0.15rem;
}

.settings-global-card {
  padding: 1.75rem 2rem;
}

.global-settings-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.voice-select {
  width: 100%;
  max-width: 300px;
  padding: 0.75rem 1.25rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.voice-select:focus-visible {
  border-color: var(--color-primary);
}

.btn-order-move {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background: var(--panel-bg);
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.btn-order-move svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.btn-order-move:disabled {
  color: var(--text-muted);
  border-color: var(--border-color);
  background: var(--bg-primary);
  cursor: not-allowed;
  opacity: 0.5;
}

/* ==========================================
   DESKTOP / MOUSE HOVER OVERRIDES
   Only trigger hovers on pointer: fine devices
   ========================================== */
@media (pointer: fine) and (hover: hover) {
  .btn-icon:hover {
    background: var(--item-hover);
    border-color: var(--text-muted);
  }
  
  .btn-order-move:not(:disabled):hover {
    background: var(--item-hover);
    border-color: var(--text-muted);
  }
  
  .exercise-item:hover {
    background: var(--item-hover);
    border-color: var(--text-muted);
    transform: translateX(4px);
  }
  
  .start-session-btn:hover {
    background: var(--color-primary-dark);
  }
  
  .btn-control-secondary:hover {
    background: var(--item-hover);
    border-color: var(--text-muted);
  }
  
  .btn-control-main:hover {
    background: var(--color-primary-dark);
  }
  
  .btn-step:hover {
    background: var(--item-hover);
    border-color: var(--text-muted);
  }
}

/* ==========================================
   MOBILE & VIEWPORT HEIGHT OPTIMIZATIONS
   ========================================== */
@media (max-width: 640px) {
  header {
    padding: 1.25rem 0.5rem 0.75rem;
    margin-bottom: 1rem;
  }
  
  h1 {
    font-size: 1.3rem;
  }
  
  .btn-icon {
    width: 44px;
    height: 44px;
  }

  main {
    padding: 0 0.25rem 1.5rem;
  }

  .dashboard-card,
  .player-card,
  .completion-card,
  .settings-exercise-card,
  .settings-global-card {
    padding: 1.25rem 1rem;
    gap: 1.25rem;
  }
  
  .welcome-msg h2 {
    font-size: 1.6rem;
  }
  
  .welcome-msg p {
    font-size: 0.95rem;
  }
  
  .exercise-item {
    gap: 0.85rem;
    padding: 0.75rem 1rem;
  }
  
  .exercise-preview-container {
    width: 60px;
    height: 60px;
  }
  
  .exercise-title {
    font-size: 1.05rem;
  }
  
  .exercise-meta {
    font-size: 0.8rem;
    gap: 0.5rem;
  }
  
  /* Viewport Height Constrained active player to prevent scrolling */
  .workout-board {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0.25rem 0;
  }
  
  .visual-timer-wrapper {
    max-width: 150px; /* Shrunk for mobile screens */
  }
  
  .time-countdown {
    font-size: 3.5rem;
  }
  
  .state-label {
    font-size: 0.9rem;
  }
  
  .leg-indicator {
    font-size: 0.85rem;
    margin-top: 0.25rem;
    padding: 0.15rem 0.5rem;
  }
  
  .diagram-panel {
    min-height: 160px; /* Reduced vertical footprint */
    max-height: 220px;
    padding: 0.5rem;
  }
  
  .player-stats {
    padding: 1rem 0;
    gap: 1rem;
  }
  
  .stat-value {
    font-size: 1.8rem;
  }
  
  .player-controls {
    gap: 1rem;
  }
  
  .btn-control-main {
    width: 68px;
    height: 68px;
  }
  
  .btn-control-main svg {
    width: 28px;
    height: 28px;
  }
  
  .btn-control-secondary {
    width: 48px;
    height: 48px;
  }
  
  .btn-control-secondary svg {
    width: 20px;
    height: 20px;
  }
}

/* Settings Stepper Distribution Alignment on Mobile */
@media (max-width: 600px) {
  .settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: 0.5rem;
  }
  
  .settings-label {
    font-size: 0.95rem;
  }
  
  .control-stepper {
    max-width: 180px;
    padding: 0.15rem;
  }
  
  .btn-step {
    width: 44px; /* Tactile targets, comfortably sized but space efficient */
    height: 44px;
    font-size: 1.2rem;
  }
  
  .stepper-value {
    font-size: 1.1rem;
    min-width: 44px;
  }
  
  .voice-select {
    max-width: 180px;
    padding: 0.6rem 0.75rem;
    font-size: 0.9rem;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .anim-pulse {
    animation: none !important;
  }
  .completion-icon {
    animation: none !important;
  }
  .view-section {
    animation: none !important;
  }
  .timer-circle-progress {
    transition: none !important;
  }
}