/* Variables - Thème clair */
:root {
  /* Thème clair */
  --light-primary: #2563eb;
  --light-primary-light: #dbeafe;
  --light-primary-dark: #1e40af;
  --light-secondary: #00b4a2;
  --light-secondary-light: #e0f7f5;
  --light-secondary-dark: #008f80;
  --light-accent: #f43f5e;
  --light-accent-light: #ffe4e6;
  --light-text: #1e293b;
  --light-text-light: #64748b;
  --light-background: #ffffff;
  --light-surface: #f8fafc;
  --light-border: #e2e8f0;
  --light-success: #10b981;
  --light-warning: #f59e0b;
  --light-info: #0ea5e9;
  --light-danger: #ef4444;
  --light-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);

  /* Thème sombre */
  --dark-primary: #3b82f6;
  --dark-primary-light: #1e3a8a;
  --dark-primary-dark: #93c5fd;
  --dark-secondary: #06b6d4;
  --dark-secondary-light: #164e63;
  --dark-secondary-dark: #67e8f9;
  --dark-accent: #fb7185;
  --dark-accent-light: #881337;
  --dark-text: #f1f5f9;
  --dark-text-light: #94a3b8;
  --dark-background: #0f172a;
  --dark-surface: #1e293b;
  --dark-border: #334155;
  --dark-success: #34d399;
  --dark-warning: #fbbf24;
  --dark-info: #38bdf8;
  --dark-danger: #f87171;
  --dark-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);

  /* Variables communes */
  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  --transition: all 0.2s ease;
}

/* Thème clair (par défaut) */
:root {
  --primary: var(--light-primary);
  --primary-light: var(--light-primary-light);
  --primary-dark: var(--light-primary-dark);
  --secondary: var(--light-secondary);
  --secondary-light: var(--light-secondary-light);
  --secondary-dark: var(--light-secondary-dark);
  --accent: var(--light-accent);
  --accent-light: var(--light-accent-light);
  --text: var(--light-text);
  --text-light: var(--light-text-light);
  --background: var(--light-background);
  --surface: var(--light-surface);
  --border: var(--light-border);
  --success: var(--light-success);
  --warning: var(--light-warning);
  --info: var(--light-info);
  --danger: var(--light-danger);
  --shadow: var(--light-shadow);
}

/* Thème sombre */
.dark-theme {
  --primary: var(--dark-primary);
  --primary-light: var(--dark-primary-light);
  --primary-dark: var(--dark-primary-dark);
  --secondary: var(--dark-secondary);
  --secondary-light: var(--dark-secondary-light);
  --secondary-dark: var(--dark-secondary-dark);
  --accent: var(--dark-accent);
  --accent-light: var(--dark-accent-light);
  --text: var(--dark-text);
  --text-light: var(--dark-text-light);
  --background: var(--dark-background);
  --surface: var(--dark-surface);
  --border: var(--dark-border);
  --success: var(--dark-success);
  --warning: var(--dark-warning);
  --info: var(--dark-info);
  --danger: var(--dark-danger);
  --shadow: var(--dark-shadow);
}

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

body {
  font-family: "Montserrat", sans-serif;
  font-weight: 400;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 15px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 25px;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

h1 {
  font-weight: 500;
  font-size: 30px;
  color: var(--primary);
  letter-spacing: 0.5px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-save-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: var(--secondary);
  color: white;
  border: none;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
  box-shadow: var(--shadow);
}

.btn-save-header:hover {
  background-color: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.light-theme .sun-icon {
  display: none;
}

.dark-theme .moon-icon {
  display: none;
}

nav {
  display: inline-flex;
  background-color: var(--surface);
  border-radius: 25px;
  padding: 3px;
  box-shadow: var(--shadow);
}

.tab {
  background: none;
  border: none;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-icon {
  stroke: currentColor;
}

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

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

/* Timer */
.timer-container {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
}

.timer-display {
  font-size: 26px;
  font-weight: 500;
  color: var(--primary);
  margin: 0 15px;
  min-width: 100px;
  text-align: center;
}

.timer-controls {
  display: flex;
  gap: 8px;
}

.timer-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

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

.timer-btn.start {
  background-color: var(--success);
  color: white;
}

.timer-btn.pause {
  background-color: var(--warning);
  color: white;
}

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

/* Labels */
.input-label,
.step-label,
.substep-label,
.progress-label,
.duration-label {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 6px;
}

/* AI Assistant (chat) */
.ai-assistant-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
}

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

.btn-ai-toggle:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.ai-panel {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 350px;
  height: 500px;
  background-color: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  z-index: 10;
  display: flex;
  flex-direction: column;
}

.ai-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  border-bottom: 1px solid var(--border);
  background-color: var(--primary);
  color: white;
}

.ai-header h3 {
  font-weight: 500;
  font-size: 18px;
  margin: 0;
}

.btn-close-ai {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.btn-close-ai:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.message {
  max-width: 80%;
  padding: 12px 15px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.4;
}

.message.user {
  align-self: flex-end;
  background-color: var(--primary);
  color: white;
  border-bottom-right-radius: 5px;
}

.message.assistant {
  align-self: flex-start;
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-bottom-left-radius: 5px;
}

.ai-input {
  display: flex;
  padding: 12px;
  border-top: 1px solid var(--border);
  background-color: var(--background);
}

.ai-input input {
  flex: 1;
  padding: 10px 15px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 15px;
  font-family: "Montserrat", sans-serif;
  background-color: var(--background);
  color: var(--text);
}

.ai-input input:focus {
  outline: none;
  border-color: var(--primary);
}

.ai-input button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background-color: var(--primary);
  color: white;
  margin-left: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.ai-input button:hover {
  background-color: var(--primary-dark);
}

.ai-templates {
  padding: 15px;
  border-top: 1px solid var(--border);
}

.ai-templates h4 {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--primary);
}

.template-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.template-btn {
  padding: 8px 12px;
  background-color: var(--primary-light);
  color: var(--primary);
  border: none;
  border-radius: 15px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
}

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

/* Pages */
.page {
  display: none;
}

.page.active {
  display: block;
}

/* Inputs */
.input-wrapper {
  margin-bottom: 25px;
  display: flex;
  flex-direction: column;
}

.title-input {
  width: 100%;
  padding: 12px 0;
  font-size: 22px;
  font-weight: 400;
  border: none;
  border-bottom: 2px solid var(--border);
  background: transparent;
  color: var(--text);
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
}

.title-input:focus {
  outline: none;
  border-color: var(--primary);
}

.duration-row {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-top: 15px;
}

.duration-input {
  width: 80px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: var(--background);
  color: var(--text);
  font-family: "Montserrat", sans-serif;
  font-size: 15px;
  transition: var(--transition);
}

.duration-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.step-input,
.substep-input {
  width: 100%;
  padding: 10px 0;
  border: none;
  background: transparent;
  font-size: 16px;
  color: var(--text);
  font-family: "Montserrat", sans-serif;
}

.step-input:focus,
.substep-input:focus {
  outline: none;
}

.step-duration {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.step-duration-input {
  width: 60px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: var(--background);
  color: var(--text);
  font-family: "Montserrat", sans-serif;
  font-size: 14px;
  transition: var(--transition);
}

.step-duration-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Buttons */
.actions {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
}

.sticky-actions {
  position: sticky;
  bottom: 15px;
  background-color: var(--background);
  padding: 10px 0;
  z-index: 90;
  display: flex;
  justify-content: flex-end;
}

.btn-primary,
.btn-add {
  padding: 12px 24px;
  border: none;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon-svg {
  stroke: currentColor;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-add {
  background-color: var(--surface);
  color: var(--primary);
}

.btn-add:hover {
  background-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-icon {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-light);
}

.btn-add-substep {
  color: var(--primary);
}

.btn-delete,
.btn-delete-substep {
  color: var(--text-light);
}

.btn-add-substep:hover {
  background-color: var(--primary-light);
}

.btn-delete:hover,
.btn-delete-substep:hover {
  background-color: rgba(244, 67, 54, 0.1);
  color: var(--danger);
}

.btn-toggle {
  font-size: 16px;
  color: var(--text-light);
  transition: transform 0.3s ease;
}

.session-step-header.open .btn-toggle {
  transform: rotate(45deg);
}

.btn-note {
  background: none;
  border: none;
  padding: 8px 0;
  font-size: 15px;
  color: var(--primary);
  cursor: pointer;
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
  display: flex;
  align-items: center;
  gap: 8px;
}

.note-icon {
  stroke: currentColor;
}

.btn-note:hover {
  opacity: 0.8;
}

.btn-mark {
  background: none;
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 15px;
  font-size: 14px;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
  font-family: "Montserrat", sans-serif;
  display: flex;
  align-items: center;
  gap: 6px;
}

.mark-icon {
  stroke: currentColor;
}

.btn-mark[data-completed="true"] {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-light);
}

.btn-mark:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Steps */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.step {
  background-color: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 3px solid var(--primary);
}

.step:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 15px;
}

.step-header-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.step-status {
  font-size: 12px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 10px;
  display: inline-block;
  margin-top: 4px;
  margin-bottom: 4px;
  align-self: flex-start;
}

.step-status[data-status="not-started"] {
  background-color: var(--text-light);
  color: var(--background);
}

.step-status[data-status="in-progress"] {
  background-color: var(--info);
  color: var(--background);
}

.step-status[data-status="completed"] {
  background-color: var(--success);
  color: var(--background);
}

.step-status[data-status="review"] {
  background-color: var(--warning);
  color: var(--background);
}

.step-actions {
  display: flex;
  gap: 6px;
}

.substeps {
  padding: 0 15px 15px 30px;
  border-top: 1px solid var(--border);
}

.substep {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.substep:last-child {
  border-bottom: none;
}

/* Session */
.session-header {
  margin-bottom: 25px;
}

.session-title {
  font-size: 26px;
  font-weight: 400;
  margin-bottom: 20px;
  color: var(--primary);
}

.progress-wrapper {
  margin-bottom: 20px;
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.progress-bar {
  flex-grow: 1;
  height: 8px;
  background-color: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  background-color: var(--primary);
  transition: width 0.5s ease;
}

.progress-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--primary);
}

.session-steps {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.session-step {
  background-color: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 3px solid var(--primary);
}

.session-step:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.session-step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  cursor: pointer;
}

.step-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transition: var(--transition);
}

.status-dot[data-status="not-started"] {
  background-color: var(--text-light);
}

.status-dot[data-status="in-progress"] {
  background-color: var(--info);
}

.status-dot[data-status="completed"] {
  background-color: var(--success);
}

.status-dot[data-status="review"] {
  background-color: var(--warning);
}

.step-title {
  font-size: 16px;
  color: var(--text);
}

.step-status-badge {
  font-size: 12px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 10px;
  margin-left: 8px;
}

.step-status-badge[data-status="not-started"] {
  background-color: var(--text-light);
  color: var(--background);
}

.step-status-badge[data-status="in-progress"] {
  background-color: var(--info);
  color: var(--background);
}

.step-status-badge[data-status="completed"] {
  background-color: var(--success);
  color: var(--background);
}

.step-status-badge[data-status="review"] {
  background-color: var(--warning);
  color: var(--background);
}

.session-step-content {
  padding: 0 15px 15px 35px;
  border-top: 1px solid var(--border);
}

.note-section {
  margin-top: 15px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.note-area {
  margin-top: 8px;
}

.note-area textarea {
  width: 100%;
  height: 90px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  resize: none;
  font-size: 15px;
  font-family: "Montserrat", sans-serif;
  transition: var(--transition);
  background-color: var(--surface);
  color: var(--text);
}

.note-area textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 135, 176, 0.1);
}

.substeps-list {
  display: flex;
  flex-direction: column;
}

.session-substep {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.session-substep:last-child {
  border-bottom: none;
}

.substep-title {
  font-size: 15px;
  color: var(--text);
}

.step-duration-display {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--text-light);
  margin-left: 8px;
}

.step-duration-display svg {
  width: 14px;
  height: 14px;
}

/* Utilities */
.hidden {
  display: none;
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 15px 12px;
  }

  h1 {
    font-size: 24px;
  }

  .header-top {
    flex-direction: column;
    gap: 12px;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .title-input {
    font-size: 20px;
  }

  .actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-add {
    width: 100%;
    justify-content: center;
  }

  .ai-panel {
    width: 90%;
    right: 5%;
    left: 5%;
    height: 70vh;
  }

  .timer-container {
    flex-direction: column;
    gap: 10px;
  }

  .duration-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}