/* ============================================================
   main.css — Design System GRADA / AEEMCI
   Palette officielle : Orange (#F97316), Vert (#16A34A), Blanc
   ============================================================ */

/* ─── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;600;700;800&display=swap');

/* ─── CSS Custom Properties (Design Tokens) ────────────────── */
:root {
  /* Couleurs AEEMCI */
  --color-primary: #F97316;       /* Orange principal */
  --color-primary-dark: #EA580C;  /* Orange foncé (hover) */
  --color-primary-light: #FED7AA; /* Orange clair (bg) */
  --color-primary-xlight: #FFF7ED; /* Orange très clair */

  --color-secondary: #16A34A;     /* Vert principal */
  --color-secondary-dark: #15803D; /* Vert foncé (hover) */
  --color-secondary-light: #BBF7D0; /* Vert clair */
  --color-secondary-xlight: #F0FDF4; /* Vert très clair */

  /* Neutres */
  --color-white: #FFFFFF;
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-border: #E5E7EB;
  --color-border-focus: #F97316;

  /* Textes */
  --color-text: #1A1A1A;
  --color-text-muted: #6B7280;
  --color-text-light: #9CA3AF;

  /* États */
  --color-success: #16A34A;
  --color-error: #DC2626;
  --color-warning: #D97706;
  --color-info: #2563EB;

  /* Typographie */
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Outfit', sans-serif;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-orange: 0 4px 14px rgba(249,115,22,0.3);
  --shadow-green: 0 4px 14px rgba(22,163,74,0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: #FFFDF9;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Watermark background ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url('../assets/logo-aeemci.png');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 55%;
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* ─── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin-bottom: 0; }

/* ─── Layout Utilities ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container--narrow {
  max-width: 680px;
}

.container--wide {
  max-width: 1300px;
}

/* ─── Header / Navbar ──────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(249,115,22,0.25);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  filter: brightness(0) invert(1);
}

.site-header__title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--color-white);
  line-height: 1.1;
}

.site-header__subtitle {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.8);
  font-weight: 400;
  display: block;
}

.site-header__nav {
  display: flex;
  gap: var(--space-2);
}

/* ─── Hero Banner ──────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, #FFF7ED 0%, #FFFFFF 45%, #F0FDF4 100%);
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 3px solid var(--color-primary);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 10% 20%, rgba(249,115,22,0.12) 0%, transparent 55%),
    radial-gradient(ellipse at 90% 80%, rgba(22,163,74,0.10) 0%, transparent 55%);
  pointer-events: none;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(249,115,22,0.10);
  border: 2px solid var(--color-primary);
  color: var(--color-primary-dark);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.hero__title span {
  background: linear-gradient(135deg, var(--color-primary), #FB923C);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--color-secondary-dark);
  font-weight: 600;
  margin-bottom: var(--space-4);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__date-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-white);
  border: 2px solid var(--color-primary-light);
  border-radius: var(--radius-xl);
  padding: var(--space-3) var(--space-6);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-orange);
}

.hero__date-badge .date-item {
  text-align: center;
}

.hero__date-badge .date-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.hero__date-badge .date-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.hero__date-badge .date-sep {
  width: 1px;
  height: 40px;
  background: var(--color-primary-light);
}

.hero__logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin: 0 auto var(--space-6);
  filter: drop-shadow(0 4px 12px rgba(249,115,22,0.3));
}

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card--elevated {
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.card--orange {
  background: linear-gradient(135deg, var(--color-primary-xlight), var(--color-white));
  border-color: var(--color-primary-light);
}

.card--green {
  background: linear-gradient(135deg, var(--color-secondary-xlight), var(--color-white));
  border-color: var(--color-secondary-light);
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before { opacity: 1; }

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

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(249,115,22,0.4);
}

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

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

.btn--secondary:hover {
  background: var(--color-secondary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

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

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

.btn--outline-green {
  background: transparent;
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.btn--outline-green:hover {
  background: var(--color-secondary-xlight);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

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

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.85rem;
}

.btn--full {
  width: 100%;
}

.btn:disabled, .btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn--loading {
  pointer-events: none;
  opacity: 0.8;
}

/* ─── Form Elements ─────────────────────────────────────────── */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-label .optional {
  color: var(--color-text-light);
  font-weight: 400;
  font-size: 0.8rem;
  margin-left: var(--space-2);
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  transition: all var(--transition-fast);
  outline: none;
  appearance: none;
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
}

.form-control::placeholder {
  color: var(--color-text-light);
}

.form-control.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}

.form-control.success {
  border-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(22,163,74,0.1);
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ─── File Upload ───────────────────────────────────────────── */
.file-upload {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: var(--color-bg);
}

.file-upload:hover,
.file-upload.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-xlight);
}

.file-upload input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 10;
}

.file-upload__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
  opacity: 0.5;
}

.file-upload__text {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.file-upload__hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.file-upload__preview {
  display: none;
  position: relative;
}

.file-upload__preview.active {
  display: block;
}

.file-upload__preview img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-2);
  border: 3px solid var(--color-primary);
}

/* ─── Alerts / Notifications ────────────────────────────────── */
.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  animation: slideInDown 0.3s ease;
}

.alert--success {
  background: var(--color-secondary-xlight);
  border-color: var(--color-secondary);
  color: #166534;
}

.alert--error {
  background: #FEF2F2;
  border-color: var(--color-error);
  color: #991B1B;
}

.alert--warning {
  background: #FFFBEB;
  border-color: var(--color-warning);
  color: #92400E;
}

.alert--info {
  background: #EFF6FF;
  border-color: var(--color-info);
  color: #1E40AF;
}

.alert__icon { font-size: 1.2rem; flex-shrink: 0; }

/* ─── Badges ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge--orange {
  background: var(--color-primary-light);
  color: #9A3412;
}

.badge--green {
  background: var(--color-secondary-light);
  color: #14532D;
}

.badge--gray {
  background: #F3F4F6;
  color: #374151;
}

/* ─── Loading Spinner ───────────────────────────────────────── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

.spinner--dark {
  border-color: rgba(0,0,0,0.1);
  border-top-color: var(--color-primary);
}

/* ─── Toast Notifications ───────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 380px;
}

.toast {
  background: var(--color-white);
  color: var(--color-text);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 3.7s forwards;
  font-size: 0.9rem;
  border-left: 4px solid;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
}

.toast--success { border-color: var(--color-secondary); }
.toast--error { border-color: var(--color-error); }
.toast--info { border-color: var(--color-info); }

/* ─── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: linear-gradient(135deg, var(--color-secondary-xlight) 0%, #FFFFFF 50%, var(--color-primary-xlight) 100%);
  border-top: 3px solid var(--color-secondary);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-8) var(--space-4);
  margin-top: var(--space-16);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--color-primary);
}

.site-footer__divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-4) 0;
}

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes slideInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; pointer-events: none; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fadeInUp {
  animation: fadeInUp 0.5s ease forwards;
}

/* ─── Utility Classes ───────────────────────────────────────── */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --space-16: 3rem;
    --space-12: 2.5rem;
  }

  .btn--lg {
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
  }

  #toast-container {
    bottom: var(--space-4);
    right: var(--space-4);
    left: var(--space-4);
    max-width: none;
  }
}