/**
 * Style.css - Warm & Calm theme for Chassis Rebuild exercise tracker
 */

:root {
  /* Warm Color Palette */
  --primary-color: #9ca89a;
  --primary-light: #b8c4b6;
  --primary-dark: #7a8578;
  --accent-color: #d4c5b0;
  --accent-light: #e8dcc8;
  --success-color: #a8b8a0;
  --danger-color: #d4736f;
  --bg-color: #faf8f5;
  --bg-secondary: #f7f5f2;
  --card-bg: #fef9f3;
  --text-primary: #5a5450;
  --text-secondary: #8a7f7a;
  --text-muted: #a89f9a;
  --border-color: #e8dcc8;
  --shadow: 0 2px 8px rgba(90, 84, 80, 0.08);
  --shadow-lg: 0 8px 16px rgba(90, 84, 80, 0.12);
  --radius: 10px;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  letter-spacing: 0.3px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============== HEADER & PROGRESS BAR ============== */

header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  box-shadow: var(--shadow-lg);
  padding: 40px 0;
  margin-bottom: 40px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

h1 {
  font-size: 40px;
  font-weight: 700;
  color: white;
  letter-spacing: -0.5px;
}

.subtitle {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  margin-top: 4px;
  font-weight: 400;
  letter-spacing: 0.5px;
}

.progress-section {
  width: 100%;
  margin-top: 24px;
}

.progress-label {
  font-size: 11px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}

.progress-bar {
  width: 100%;
  height: 32px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.3);
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color) 0%, var(--accent-light) 100%);
  transition: width 0.4s ease;
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.1);
}

.progress-text {
  margin-top: 8px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

/* ============== CONTROLS SECTION ============== */

.controls {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.selector-group {
  display: flex;
  gap: 20px;
  flex: 1;
  min-width: 300px;
}

.selector-group > div {
  flex: 1;
  min-width: 150px;
}

.selector-group label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.selector-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background-color: white;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.selector-group select:hover {
  border-color: var(--primary-color);
}

.selector-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(156, 168, 154, 0.1);
}

.progress-management {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* ============== BUTTONS ============== */

.btn {
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-danger:hover {
  background-color: #c95f5a;
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-danger:active {
  transform: translateY(0);
}

/* ============== PHASE INFO ============== */

.phase-info {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

#phase-description {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 16px;
}

#phase-duration,
#phase-frequency {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

#phase-duration strong,
#phase-frequency strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============== EXERCISE SECTIONS ============== */

.exercise-sections {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 40px;
}

.section {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.section:hover {
  box-shadow: var(--shadow-lg);
}

.section-header {
  background-color: var(--bg-secondary);
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.section-header:hover {
  background-color: var(--accent-light);
}

.section-header.expanded {
  background-color: var(--accent-light);
}

.section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

.section-toggle {
  font-size: 18px;
  transition: transform 0.3s ease;
  color: var(--primary-color);
}

.section.expanded .section-toggle {
  transform: rotate(180deg);
}

.section-content {
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.section.expanded .section-content {
  max-height: 2000px;
  padding: 20px;
}

.exercise-item {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.exercise-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.exercise-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.exercise-checkbox {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--success-color);
  flex-shrink: 0;
}

.exercise-item input:checked ~ .exercise-name {
  color: var(--text-muted);
}

.exercise-item input:checked ~ .exercise-name::before {
  content: '✓';
  color: var(--success-color);
  font-weight: bold;
  margin-right: 4px;
}

.exercise-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 12px;
  font-size: 13px;
}

.detail {
  display: flex;
  flex-direction: column;
}

.detail-label {
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 11px;
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.detail-value {
  color: var(--text-primary);
  line-height: 1.5;
}

.exercise-description {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: 12px;
  padding: 12px;
  background-color: #fafaf8;
  border-left: 3px solid var(--accent-color);
  border-radius: 4px;
}

.video-button {
  display: inline-block;
  margin-top: 12px;
  padding: 8px 16px;
  background-color: var(--accent-color);
  color: var(--text-primary);
  border: none;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.video-button:hover {
  background-color: var(--primary-light);
}

.video-button:active {
  transform: scale(0.98);
}

/* ============== VIDEO MODAL ============== */

.video-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(90, 84, 80, 0.6);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.video-modal.active {
  display: flex;
}

.modal-content {
  background: var(--card-bg);
  border-radius: var(--radius);
  width: 90%;
  max-width: 700px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.modal-header h2 {
  font-size: 18px;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  border-radius: 4px;
}

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

.modal-body {
  padding: 24px;
}

#video-container {
  text-align: center;
}

#video-container p {
  color: var(--text-secondary);
  font-size: 14px;
}

#video-container {
  width: 100%;
}

#video-container iframe {
  max-width: 100%;
}

#video-container video {
  max-width: 100%;
}

#video-container a {
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
}

/* ============== ERROR STATE ============== */

.error {
  background-color: #ffe8e8;
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
  padding: 16px 20px;
  border-radius: var(--radius);
  margin: 20px 0;
  font-size: 14px;
}

/* ============== RESPONSIVE DESIGN ============== */

@media (max-width: 768px) {
  h1 {
    font-size: 28px;
  }

  .subtitle {
    font-size: 12px;
  }

  .controls {
    flex-direction: column;
    gap: 16px;
  }

  .selector-group {
    width: 100%;
  }

  .progress-management {
    width: 100%;
    justify-content: center;
  }

  .btn {
    padding: 8px 12px;
    font-size: 12px;
    flex: 1;
    justify-content: center;
  }

  .exercise-details {
    grid-template-columns: 1fr;
  }

  .modal-content {
    width: 95%;
    max-height: 90vh;
  }

  .section-header {
    padding: 16px;
  }

  .section-content {
    padding: 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }

  h1 {
    font-size: 22px;
  }

  header {
    padding: 24px 0;
    margin-bottom: 24px;
  }

  .progress-management {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .section-title {
    font-size: 14px;
  }

  .exercise-details {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}