/* ========================================
   MICHI NO KATA - MOBILE-FIRST CSS
   ======================================== */

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

:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-text: #0f172a;
  --color-text-secondary: #64748b;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-border: #e2e8f0;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .animate-ready {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   SPA APP SHELL LAYOUT
   ======================================== */

.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh; /* dynamic viewport height for mobile browsers */
  overflow: hidden;
}

.app-body {
  display: flex;
  flex: 1;
  min-height: 0; /* permet au flex child de se contraindre a la hauteur disponible */
  padding-top: calc(3.5rem + env(safe-area-inset-top, 0)); /* header height + safe area */
  overflow: hidden;
}

.app-main {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden; /* PAS de scroll ici — le scroll est dans .app-main-scroll */
}

.app-main-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
}

/* Desktop: offset for sidebar */
@media (min-width: 1024px) {
  .app-body {
    padding-left: 260px;
  }
}

/* Container (Mobile-First) */
.container {
  width: 100%;
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
  margin: 0 auto;
}

@media (min-width: 768px) {
  .container {
    max-width: 768px;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 960px;
  }
}

/* ========================================
   DASHBOARD (SPA home)
   ======================================== */

.dashboard {
  padding: var(--spacing-md) var(--spacing-sm);
}

@media (min-width: 768px) {
  .dashboard {
    padding: var(--spacing-lg) var(--spacing-md);
  }
}

.dash-hero {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.dash-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
}

.dash-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

.dash-progress {
  margin-bottom: var(--spacing-xl);
}

.dash-pillar {
  margin-bottom: var(--spacing-lg);
}

.dash-pillar-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.dash-modules {
  display: grid;
  gap: var(--spacing-sm);
}

@media (min-width: 768px) {
  .dash-modules {
    grid-template-columns: repeat(2, 1fr);
  }
}

.dash-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

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

.dash-card--locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.dash-card--locked:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}

.dash-card-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
}

.dash-card-label {
  flex: 1;
  font-weight: 600;
}

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

.dash-card-status {
  font-size: 1rem;
}

@media (max-width: 480px) {
  .dash-card {
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
  }

  .dash-card-icon {
    font-size: 1.5rem;
  }

  .dash-card-label {
    font-size: var(--font-size-sm);
  }

  .dash-card-duration {
    display: none;
  }
}

/* ========================================
   HEADER
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 300;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-xs) var(--spacing-sm);
  padding-top: calc(var(--spacing-xs) + env(safe-area-inset-top, 0));
  padding-left: calc(var(--spacing-sm) + env(safe-area-inset-left, 0));
  padding-right: calc(var(--spacing-sm) + env(safe-area-inset-right, 0));
  height: calc(3.5rem + env(safe-area-inset-top, 0));
}

/* Menu toggle (mobile hamburger) */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text);
  border-radius: var(--radius-sm);
}

.menu-toggle:hover {
  background-color: var(--color-bg-secondary);
}

@media (min-width: 1024px) {
  .menu-toggle {
    display: none;
  }
}

/* Module title in header */
.module-title-header {
  font-size: var(--font-size-sm);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 30vw;
  flex-shrink: 1;
  min-width: 0;
}

@media (min-width: 768px) {
  .module-title-header {
    font-size: var(--font-size-base);
    max-width: 40vw;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Depth Selector (E/A/X) */
.depth-selector {
  display: flex;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
}

.depth-btn {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.depth-btn:hover {
  color: var(--color-text);
  background-color: var(--color-border);
}

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

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

@media (max-width: 480px) {
  .depth-selector {
    display: none;
  }
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xs);
  max-width: 100%;
  overflow: hidden;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text {
  font-size: var(--font-size-lg);
}

@media (max-width: 480px) {
  .logo-text {
    display: none;
  }
}

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

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.2s ease;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  font-size: 1.25rem;
}

.btn-icon:hover {
  background-color: var(--color-border);
}

.btn-icon:active {
  transform: scale(0.95);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

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

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.btn-secondary:hover {
  background-color: var(--color-border);
}

.btn-text {
  background: none;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  text-decoration: underline;
  padding: var(--spacing-xs);
}

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

/* ========================================
   MAIN CONTENT
   ======================================== */

.main {
  padding: var(--spacing-lg) 0;
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.hero-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-xl);
  }
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
}

/* Section Title */
.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

/* ========================================
   PROGRESS SECTION
   ======================================== */

.progress-section {
  margin: var(--spacing-xl) 0;
}

.progress-bar {
  width: 100%;
  height: 0.75rem;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  border-radius: var(--radius-lg);
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
}

/* ========================================
   MODULES SECTION (Mobile-First Cards)
   ======================================== */

.modules-section {
  margin: var(--spacing-xl) 0;
}

.modules-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.module-card {
  display: block;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

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

.module-card:active {
  transform: translateY(0);
}

.module-header {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.module-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.module-info {
  flex: 1;
}

.module-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.module-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.module-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.module-duration {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.module-status {
  font-size: 1.25rem;
}

/* ========================================
   NOTES SECTION
   ======================================== */

.notes-section {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

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

.notes-editor {
  margin-bottom: var(--spacing-lg);
}

.notes-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  resize: vertical;
  background-color: var(--color-bg);
  color: var(--color-text);
}

.notes-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.notes-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.notes-actions button {
  flex: 1;
  min-width: 150px;
}

@media (max-width: 480px) {
  .notes-actions button {
    width: 100%;
  }
}

/* Notes History */
.notes-history {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.note-item {
  padding: var(--spacing-md);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.note-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.note-content {
  color: var(--color-text);
  line-height: 1.6;
}

/* ========================================
   QUICKSTART SECTION
   ======================================== */

.quickstart-section {
  margin: var(--spacing-xl) 0;
}

.quickstart-cards {
  display: grid;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .quickstart-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.quickstart-card {
  display: block;
  padding: var(--spacing-lg);
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.quickstart-card:active {
  transform: translateY(-2px);
}

.quickstart-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.quickstart-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.quickstart-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-sm);
  padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 0));
  text-align: center;
  background-color: var(--color-bg);
}

.footer-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

/* ========================================
   TOAST (Status Messages)
   ======================================== */

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-text);
  color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s ease;
  max-width: 90%;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background-color: var(--color-success);
}

.toast.error {
  background-color: var(--color-error);
}

.toast.warning {
  background-color: var(--color-warning);
}

@media (max-width: 768px) {
  .toast {
    bottom: calc(1rem + env(safe-area-inset-bottom, 0));
    max-width: calc(100% - 2rem);
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* ========================================
   BACK TO TOP
   ======================================== */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem);
  transition: all 0.3s ease;
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-lg);
}

.back-to-top:active {
  transform: scale(0.95);
}

@media (max-width: 768px) {
  .back-to-top {
    width: 2.5rem;
    height: 2.5rem;
    bottom: 1.25rem;
    right: 1.25rem;
    font-size: 1rem;
  }
}

/* ========================================
   VOICE RECORDING INDICATOR
   ======================================== */

.voice-recording #voice-btn {
  background-color: var(--color-error);
  color: white;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

/* ========================================
   SEARCH PALETTE (Ctrl+K)
   ======================================== */

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0.15s ease;
}

.search-overlay.search-open {
  opacity: 1;
  visibility: visible;
}

.search-modal {
  width: 100%;
  max-width: 560px;
  max-height: 60vh;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.search-input {
  width: 100%;
  padding: var(--spacing-md);
  border: none;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-lg);
  font-family: var(--font-family);
  background: transparent;
  color: var(--color-text);
  outline: none;
}

.search-results {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xs);
}

.search-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  cursor: pointer;
  text-align: left;
}

.search-result:hover,
.search-result--active {
  background-color: var(--color-bg-secondary);
}

.search-result-parent {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.search-empty {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-text-secondary);
}

.search-hint {
  padding: var(--spacing-xs) var(--spacing-md);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
}

@media (max-width: 768px) {
  .search-overlay {
    padding-top: 0;
    align-items: stretch;
  }

  .search-modal {
    max-width: 100%;
    max-height: 100%;
    border-radius: 0;
    border: none;
  }

  .search-input {
    font-size: var(--font-size-base);
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + env(safe-area-inset-top, 0));
  }

  .search-result {
    padding: var(--spacing-md);
    min-height: 3rem;
  }
}

/* ========================================
   FOCUS MODE (Ctrl+Shift+F)
   ======================================== */

.focus-mode .header,
.focus-mode .sidebar,
.focus-mode .sidebar-overlay,
.focus-mode .tab-bar,
.focus-mode .footer {
  display: none !important;
}

.focus-mode .app-body {
  padding-left: 0 !important;
  padding-top: 0 !important;
}

.focus-mode .main-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  .header,
  .sidebar,
  .sidebar-overlay,
  .tab-bar,
  .footer,
  .toast,
  .search-overlay,
  .back-to-top,
  .depth-selector,
  .flashcard-actions,
  .quiz-retry-btn,
  .scenario-toggle {
    display: none !important;
  }

  .app-body {
    padding-left: 0 !important;
    padding-top: 0 !important;
  }

  .flashcard-answer {
    display: block !important;
  }

  .scenario-solution {
    display: block !important;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  .content-section {
    page-break-inside: avoid;
  }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }