/* ============================================
   BRIEFED - Stylesheet
   Générateur de briefs design avec IA
   
   Table des matières :
   1. Variables CSS
   2. Reset & Base
   3. Typography
   4. Layout
   5. Header
   6. Hero Section
   7. Form Section
   8. Selection Cards
   9. Buttons
   10. Result Section
   11. Footer
   12. Utilities
   13. Responsive
============================================ */

/* ============================================
   1. VARIABLES CSS
============================================ */
:root {
  /* Couleurs principales */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-background: #ffffff;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-text-muted: #9ca3af;
  --color-card: #f9fafb;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  /* Couleurs par discipline */
  --color-logo: #6366f1;
  --color-web: #3b82f6;
  --color-mobile: #8b5cf6;
  --color-packaging: #ec4899;
  --color-print: #f59e0b;
  --color-illustration: #10b981;

  /* Couleurs par niveau */
  --color-beginner: #10b981;
  --color-intermediate: #f59e0b;
  --color-advanced: #ef4444;

  /* Typographie */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  /* Espacements */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;

  /* Rayons de bordure */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Ombres */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-button: 0 2px 8px rgba(99, 102, 241, 0.3);
  --shadow-button-hover: 0 4px 12px rgba(99, 102, 241, 0.4);

  /* Transitions */
  --transition-fast: 0.2s ease;
}

/* ============================================
   2. RESET & BASE
============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
}

/* ============================================
   3. TYPOGRAPHY
============================================ */
h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

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

/* ============================================
   4. LAYOUT
============================================ */
main {
  width: 100%;
}

.card {
  max-width: 700px;
  margin: 0 auto;
  background: var(--color-background);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border-light);
}

.card-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   5. HEADER
============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

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

/* ============================================
   6. HERO SECTION
============================================ */
.hero {
  position: relative;
  padding: var(--spacing-3xl) var(--spacing-md) var(--spacing-2xl);
  text-align: center;
  overflow: hidden;
}

/* Gradient background subtil */
.hero::before {
  content: "";
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 150%;
  height: 500px;
  background: radial-gradient(
    ellipse at center top,
    rgba(99, 102, 241, 0.12) 0%,
    transparent 70%
  );
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-light);
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto;
}

/* ============================================
   7. FORM SECTION
============================================ */
.form-section {
  padding: 0 var(--spacing-md) var(--spacing-xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group:last-of-type {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: #374151;
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   8. SELECTION CARDS
============================================ */

/* Grilles */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

/* Style de base des cards */
.selection-card {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.selection-card:hover {
  transform: translateY(-2px);
}

.selection-card:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* ========================================
   Hover states par discipline
======================================== */
.project-card[data-color="logo"]:hover {
  border-color: var(--color-logo);
  background: rgba(99, 102, 241, 0.1);
}

.project-card[data-color="web"]:hover {
  border-color: var(--color-web);
  background: rgba(59, 130, 246, 0.1);
}

.project-card[data-color="mobile"]:hover {
  border-color: var(--color-mobile);
  background: rgba(139, 92, 246, 0.1);
}

.project-card[data-color="packaging"]:hover {
  border-color: var(--color-packaging);
  background: rgba(236, 72, 153, 0.1);
}

.project-card[data-color="print"]:hover {
  border-color: var(--color-print);
  background: rgba(245, 158, 11, 0.1);
}

.project-card[data-color="illustration"]:hover {
  border-color: var(--color-illustration);
  background: rgba(16, 185, 129, 0.1);
}

/* ========================================
   Selected states par discipline
======================================== */
.project-card[data-color="logo"].selected {
  border-color: var(--color-logo);
  background: var(--color-logo);
  color: white;
  font-weight: 600;
}

.project-card[data-color="web"].selected {
  border-color: var(--color-web);
  background: var(--color-web);
  color: white;
  font-weight: 600;
}

.project-card[data-color="mobile"].selected {
  border-color: var(--color-mobile);
  background: var(--color-mobile);
  color: white;
  font-weight: 600;
}

.project-card[data-color="packaging"].selected {
  border-color: var(--color-packaging);
  background: var(--color-packaging);
  color: white;
  font-weight: 600;
}

.project-card[data-color="print"].selected {
  border-color: var(--color-print);
  background: var(--color-print);
  color: white;
  font-weight: 600;
}

.project-card[data-color="illustration"].selected {
  border-color: var(--color-illustration);
  background: var(--color-illustration);
  color: white;
  font-weight: 600;
}

/* ========================================
   Hover states par niveau
======================================== */
.level-card[data-color="beginner"]:hover {
  border-color: var(--color-beginner);
  background: rgba(16, 185, 129, 0.1);
}

.level-card[data-color="intermediate"]:hover {
  border-color: var(--color-intermediate);
  background: rgba(245, 158, 11, 0.1);
}

.level-card[data-color="advanced"]:hover {
  border-color: var(--color-advanced);
  background: rgba(239, 68, 68, 0.1);
}

/* ========================================
   Selected states par niveau
======================================== */
.level-card[data-color="beginner"].selected {
  border-color: var(--color-beginner);
  background: var(--color-beginner);
  color: white;
  font-weight: 600;
}

.level-card[data-color="intermediate"].selected {
  border-color: var(--color-intermediate);
  background: var(--color-intermediate);
  color: white;
  font-weight: 600;
}

.level-card[data-color="advanced"].selected {
  border-color: var(--color-advanced);
  background: var(--color-advanced);
  color: white;
  font-weight: 600;
}

/* ============================================
   9. BUTTONS
============================================ */

/* Bouton primaire (CTA) */
.btn-primary {
  width: 100%;
  height: 56px;
  margin-top: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  background: var(--color-primary);
  color: white;
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: var(--shadow-button);
  transition: all var(--transition-fast);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-button-hover);
  transform: translateY(-1px);
}

.btn-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary:disabled:hover {
  box-shadow: var(--shadow-button);
}

/* États du bouton */
.btn-text {
  display: inline;
}

.btn-loading {
  display: none;
  align-items: center;
  gap: var(--spacing-xs);
}

.btn-primary.loading .btn-text {
  display: none;
}

.btn-primary.loading .btn-loading {
  display: flex;
}

/* Spinner */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Bouton secondaire */
.btn-secondary {
  width: 100%;
  height: 56px;
  margin-top: var(--spacing-md);
  background: white;
  color: var(--color-primary);
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: 600;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(99, 102, 241, 0.05);
}

.btn-secondary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* ============================================
   10. RESULT SECTION
============================================ */
.result-section {
  display: none;
  padding: 0 var(--spacing-md) var(--spacing-xl);
}

.result-section.visible {
  display: block;
}

.brief-content {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  min-height: 400px;
  font-size: 16px;
  line-height: 1.8;
  color: #374151;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.brief-placeholder {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Styles pour le contenu du brief (titres Markdown convertis) */
.brief-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin: 24px 0 12px 0;
}

.brief-content h3:first-child {
  margin-top: 0;
}

.brief-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin: 20px 0 8px 0;
}

.brief-content li {
  list-style: disc;
  margin-left: 20px;
  margin-bottom: 4px;
}

.brief-content strong {
  font-weight: 600;
  color: var(--color-text);
}

/* ============================================
   11. FOOTER
============================================ */
.footer {
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: center;
}

.footer-text {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ============================================
   12. UTILITIES
============================================ */
.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* ============================================
   13. RESPONSIVE
============================================ */

/* Tablette et petit desktop */
@media (max-width: 768px) {
  .hero-title {
    font-size: 40px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .card {
    padding: var(--spacing-lg);
  }

  .card-title {
    font-size: 24px;
  }

  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 480px) {
  .hero {
    padding: var(--spacing-xl) var(--spacing-sm) var(--spacing-lg);
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .form-section,
  .result-section {
    padding: 0 var(--spacing-sm) var(--spacing-lg);
  }

  .card {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
  }

  .card-title {
    font-size: 22px;
    margin-bottom: var(--spacing-md);
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .level-grid {
    grid-template-columns: 1fr;
  }

  .selection-card {
    height: 70px;
  }

  .brief-content {
    padding: var(--spacing-md);
    min-height: 300px;
  }

  .btn-primary,
  .btn-secondary {
    height: 52px;
    font-size: 16px;
  }

  .footer {
    padding: var(--spacing-xl) var(--spacing-sm);
  }
}

/* Très petit écran */
@media (max-width: 360px) {
  .hero-title {
    font-size: 28px;
  }

  .selection-card {
    font-size: 14px;
    height: 64px;
  }
}