/* ============================================================
   1. Design tokens
   ============================================================ */
:root {
  --ec-bg:        #faf9f7;
  --ec-surface:   #ffffff;
  --ec-surface-2: #f4f1ec;
  --ec-text:      #1a1a1a;
  --ec-muted:     #6a6a6a;
  --ec-border:    #e5e2dc;
  --ec-accent:    #6366f1;
  --ec-danger:    #dc2626;
  --ec-radius:    10px;
  --ec-shadow:    0 12px 40px rgba(0,0,0,.12);
  --ec-transition: 0.2s ease;

  --ec-bloc1: #8b5cf6;
  --ec-bloc2: #3b82f6;
  --ec-bloc3: #10b981;
  --ec-bloc4: #f59e0b;
  --ec-bloc5: #ef4444;
  --ec-bloc6: #ca8a04;
}

/* ============================================================
   2. Thème sombre
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ec-bg:        #0f0f14;
    --ec-surface:   #1a1a24;
    --ec-surface-2: #252532;
    --ec-text:      #e8e8ed;
    --ec-muted:     #a0a0b0;
    --ec-border:    #2a2a3a;
    --ec-shadow:    0 12px 40px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"] {
  --ec-bg:        #0f0f14;
  --ec-surface:   #1a1a24;
  --ec-surface-2: #252532;
  --ec-text:      #e8e8ed;
  --ec-muted:     #a0a0b0;
  --ec-border:    #2a2a3a;
  --ec-shadow:    0 12px 40px rgba(0,0,0,.4);
}

/* ============================================================
   3. Layout app principal
   ============================================================ */
.ec-intro {
  text-align: center;
  max-width: 900px;
  margin: 0 auto 2rem;
}
.ec-intro h1 {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  margin-bottom: 0.75rem;
  color: var(--ec-text);
}
.ec-intro p {
  color: var(--ec-muted);
  font-size: 1.02rem;
  line-height: 1.6;
}

/* ============================================================
   4. Zone A — Grille des modules
   ============================================================ */
.ec-grid-container {
  overflow-x: auto;
  margin-bottom: 1.5rem;
}
.ec-curriculum-grid {
  display: grid;
  grid-template-columns: 170px repeat(6, minmax(140px, 1fr));
  gap: 3px;
  min-width: 960px;
  background: var(--ec-border);
  border-radius: var(--ec-radius);
  overflow: hidden;
}
.ec-grid-header {
  background: var(--ec-surface-2);
  border: none;
  padding: 1rem;
  font: inherit;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  color: var(--ec-text);
  transition: filter var(--ec-transition);
}
.ec-grid-header.ec-corner { cursor: default; background: var(--ec-surface-2); }
.ec-grid-header:not(.ec-corner):hover,
.ec-grid-header:not(.ec-corner):focus-visible { filter: brightness(0.95); }

.ec-bloc-header { font-size: 0.85rem; line-height: 1.35; color: #fff; }
.ec-bloc-header .ec-bloc-num { font-size: 0.7rem; opacity: 0.85; display: block; margin-bottom: 0.25rem; }
.ec-bloc-header.ec-bloc1 { background: linear-gradient(135deg, var(--ec-bloc1), #7c3aed); }
.ec-bloc-header.ec-bloc2 { background: linear-gradient(135deg, var(--ec-bloc2), #2563eb); }
.ec-bloc-header.ec-bloc3 { background: linear-gradient(135deg, var(--ec-bloc3), #059669); }
.ec-bloc-header.ec-bloc4 { background: linear-gradient(135deg, var(--ec-bloc4), #d97706); }
.ec-bloc-header.ec-bloc5 { background: linear-gradient(135deg, var(--ec-bloc5), #dc2626); }
.ec-bloc-header.ec-bloc6 { background: linear-gradient(135deg, var(--ec-bloc6), #a16207); color: #1a1a24; }

.ec-parcours-header {
  background: var(--ec-surface);
  text-align: left;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.ec-parcours-icon { font-size: 1.1rem; }

.ec-grid-cell {
  background: var(--ec-surface);
  border: none;
  border-left: 3px solid transparent;
  padding: 0.75rem;
  text-align: center;
  cursor: pointer;
  min-height: 68px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.2rem;
  font: inherit;
  font-size: 0.8rem;
  line-height: 1.3;
  color: var(--ec-text);
  transition: background var(--ec-transition), transform var(--ec-transition);
}
.ec-grid-cell:hover, .ec-grid-cell:focus-visible { background: var(--ec-surface-2); transform: scale(1.02); }
.ec-grid-cell.ec-empty { background: var(--ec-bg); cursor: default; opacity: 0.3; }
.ec-grid-cell.ec-empty:hover { transform: none; }
.ec-syllabus-title { font-weight: 600; }
.ec-syllabus-sub { font-size: 0.7rem; color: var(--ec-muted); }
.ec-grid-cell.ec-bloc1:not(.ec-empty) { border-left-color: var(--ec-bloc1); }
.ec-grid-cell.ec-bloc2:not(.ec-empty) { border-left-color: var(--ec-bloc2); }
.ec-grid-cell.ec-bloc3:not(.ec-empty) { border-left-color: var(--ec-bloc3); }
.ec-grid-cell.ec-bloc4:not(.ec-empty) { border-left-color: var(--ec-bloc4); }
.ec-grid-cell.ec-bloc5:not(.ec-empty) { border-left-color: var(--ec-bloc5); }
.ec-grid-cell.ec-bloc6:not(.ec-empty) { border-left-color: var(--ec-bloc6); }

/* ============================================================
   5. Footer app
   ============================================================ */
.ec-page-footer {
  text-align: center;
  padding: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.ec-link-btn {
  background: none;
  border: 1px solid var(--ec-border);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  color: var(--ec-muted);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--ec-transition);
}
.ec-link-btn:hover, .ec-link-btn:focus-visible { color: var(--ec-accent); border-color: var(--ec-accent); }

/* ============================================================
   6. Panel / dialog
   ============================================================ */
.ec-panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 2rem 1rem;
  overflow-y: auto;
}
.ec-panel-overlay[hidden] { display: none; }

.ec-panel {
  background: var(--ec-surface);
  border-radius: 16px;
  width: 100%;
  max-width: 760px;
  max-height: calc(100vh - 4rem);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--ec-shadow);
}
.ec-panel-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--ec-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}
.ec-panel-title { font-size: 1.2rem; font-weight: 700; color: var(--ec-text); }
.ec-close-btn {
  background: none;
  border: none;
  color: var(--ec-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
}
.ec-close-btn:hover, .ec-close-btn:focus-visible { background: var(--ec-surface-2); color: var(--ec-text); }
.ec-panel-content { padding: 1.5rem; overflow-y: auto; flex: 1; }

/* Contenu markdown sanitisé (syllabus / méthodologie / à propos) */
.ec-markdown h2, .ec-markdown h3, .ec-markdown h4 { color: var(--ec-accent); margin: 1.25rem 0 0.5rem; }
.ec-markdown p, .ec-markdown li { color: var(--ec-text); line-height: 1.6; }
.ec-markdown ul, .ec-markdown ol { padding-left: 1.4rem; margin-bottom: 0.75rem; }
.ec-markdown blockquote {
  border-left: 3px solid var(--ec-accent);
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  background: var(--ec-surface-2);
  border-radius: 0 8px 8px 0;
}
.ec-markdown code { background: var(--ec-surface-2); padding: 0.15rem 0.4rem; border-radius: 4px; }

/* ============================================================
   7. Composants génériques
   ============================================================ */
.ec-btn {
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter var(--ec-transition), opacity var(--ec-transition);
}
.ec-btn-primary { background: var(--ec-accent); color: #fff; }
.ec-btn-primary:hover, .ec-btn-primary:focus-visible { filter: brightness(1.08); }
.ec-btn-secondary { background: var(--ec-surface-2); color: var(--ec-text); border: 1px solid var(--ec-border); }
.ec-btn-secondary:hover, .ec-btn-secondary:focus-visible { background: var(--ec-border); }
.ec-btn:disabled { opacity: 0.55; cursor: not-allowed; }

details.ec-details { margin-bottom: 1.25rem; border: 1px solid var(--ec-border); border-radius: var(--ec-radius); }
details.ec-details summary { cursor: pointer; padding: 0.75rem 1rem; font-weight: 600; }
details.ec-details .ec-markdown { padding: 0 1rem 1rem; }

/* Chat */
.ec-chat-log {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
  max-height: 50vh;
  overflow-y: auto;
  padding-right: 0.25rem;
}
.ec-msg {
  max-width: 88%;
  padding: 0.7rem 0.95rem;
  border-radius: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
  font-size: 0.95rem;
}
.ec-msg-assistant { align-self: flex-start; background: var(--ec-surface-2); color: var(--ec-text); }
.ec-msg-user { align-self: flex-end; background: var(--ec-accent); color: #fff; }
.ec-msg-loading { align-self: flex-start; color: var(--ec-muted); font-style: italic; }

.ec-chat-form { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.ec-chat-input {
  flex: 1;
  resize: none;
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--ec-border);
  background: var(--ec-bg);
  color: var(--ec-text);
  font: inherit;
  font-size: 0.95rem;
}
.ec-chat-input:focus-visible { outline: 2px solid var(--ec-accent); }
.ec-chat-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.ec-chat-error { color: var(--ec-danger); font-size: 0.85rem; margin-bottom: 0.75rem; }

/* Formulaire certificat */
.ec-cert-form { border: 1px solid var(--ec-border); border-radius: var(--ec-radius); padding: 1rem; margin-bottom: 1rem; display: grid; gap: 0.6rem; }
.ec-cert-form label { font-size: 0.85rem; font-weight: 600; color: var(--ec-text); display: block; margin-bottom: 0.25rem; }
.ec-cert-form input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--ec-border);
  background: var(--ec-bg);
  color: var(--ec-text);
  font: inherit;
}
.ec-cert-form input:focus-visible { outline: 2px solid var(--ec-accent); }

.ec-certificate {
  border: 2px solid var(--ec-accent);
  border-radius: var(--ec-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}
.ec-certificate-eyebrow { color: var(--ec-muted); font-size: 0.8rem; margin-bottom: 0.25rem; }
.ec-certificate h3 { margin: 0 0 0.75rem; color: var(--ec-text); }
.ec-certificate-comment { color: var(--ec-muted); font-style: italic; }
.ec-certificate-date { color: var(--ec-muted); font-size: 0.85rem; }

.ec-info-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.75rem; margin-top: 1rem; }
.ec-info-card {
  background: var(--ec-surface-2);
  border: 1px solid var(--ec-border);
  border-radius: var(--ec-radius);
  padding: 1rem;
  text-align: left;
  cursor: pointer;
  color: var(--ec-text);
  font: inherit;
}
.ec-info-card:hover, .ec-info-card:focus-visible { border-color: var(--ec-accent); transform: translateY(-2px); }
.ec-info-card h4 { margin-bottom: 0.3rem; }
.ec-info-card p { color: var(--ec-muted); font-size: 0.85rem; }

/* ============================================================
   8. États
   ============================================================ */
:focus-visible { outline: 2px solid var(--ec-accent); outline-offset: 2px; }
.ec-hidden { display: none !important; }

/* ============================================================
   9. Responsive
   ============================================================ */
@media (max-width: 600px) {
  .ec-curriculum-grid { grid-template-columns: 130px repeat(6, 130px); }
  .ec-panel { margin: 0.5rem; max-height: calc(100vh - 1rem); }
  .ec-panel-content { padding: 1rem; }
  .ec-chat-form { flex-direction: column; }
}