:root {
  --bg-deep: #06080e;
  --bg-surface: rgba(14, 18, 27, 0.75);
  --bg-card: rgba(18, 24, 38, 0.6);
  --bg-card-hover: rgba(26, 35, 54, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(245, 158, 11, 0.45);
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --glass-blur: blur(18px);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
  --bg-deep: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.88);
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(217, 119, 6, 0.5);
  --accent: #d97706;
  --accent-hover: #b45309;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 2.5rem;
  background: var(--bg-surface);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--accent), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  height: 46px;
  width: 46px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.theme-toggle-btn:hover { border-color: var(--accent); }

/* Menu Profil Unique */
.user-menu-container { position: relative; }
.user-badge {
  height: 46px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  user-select: none;
}
.user-menu-container:hover .user-badge { border-color: var(--border-focus); }
.avatar { width: 32px; height: 32px; border-radius: 50%; border: 1.5px solid var(--accent); }
.user-details { display: flex; flex-direction: column; justify-content: center; }
.user-name { font-weight: 700; font-size: 0.85rem; line-height: 1.15; }
.role-tag { font-size: 0.6rem; font-weight: 800; text-transform: uppercase; padding: 1px 5px; border-radius: 3px; background: var(--accent); color: #000; width: fit-content; margin-top: 2px; }

.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  width: 100%;
  min-width: 130px;
  background: var(--bg-surface);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  padding: 0.35rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all 0.2s ease;
  z-index: 150;
}
.user-menu-container:hover .user-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.logout-link { display: block; width: 100%; padding: 0.45rem 0.6rem; text-align: center; font-size: 0.8rem; font-weight: 700; color: #ef4444; text-decoration: none; border-radius: 4px; background: rgba(239, 68, 68, 0.08); }
.logout-link:hover { background: rgba(239, 68, 68, 0.18); }

/* CONTENU PRINCIPAL */
main { max-width: 1200px; margin: 2rem auto; padding: 0 1.5rem; flex: 1; width: 100%; }

.hero-banner {
  background: var(--bg-surface);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  padding: 2rem;
  border-radius: var(--radius-lg);
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
}
.hero-header-row { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 1rem; }
.hero-banner h1 { font-size: 1.9rem; font-weight: 800; }
.hero-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.search-bar-wrapper { margin-top: 1.5rem; }
.search-input {
  width: 100%;
  padding: 0.85rem 1.25rem;
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 1rem;
}
.search-input:focus { outline: none; border-color: var(--accent); }

/* Navigation Alphabetique A-Z */
.alphabet-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.2rem;
}
.letter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.letter-btn:hover, .letter-btn.active { color: #000; background: var(--accent); border-color: var(--accent); }

/* LISTE DES REFS */
.dictionary-container { display: flex; flex-direction: column; gap: 1.5rem; margin-bottom: 3rem; }
.letter-group-title { font-size: 1.6rem; font-weight: 800; color: var(--accent); border-bottom: 2px solid var(--border-subtle); padding-bottom: 0.4rem; margin-top: 1rem; }

.entry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-card);
  position: relative;
}
.entry-card:hover { border-color: var(--border-focus); }

.entry-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 0.5rem; }
.entry-term { font-size: 1.25rem; font-weight: 800; color: var(--text-main); }
.entry-meta { font-size: 0.75rem; color: var(--text-muted); }

.entry-def { font-size: 0.95rem; line-height: 1.5; color: var(--text-main); margin-bottom: 0.6rem; }
.entry-example { font-size: 0.85rem; font-style: italic; color: var(--text-muted); background: rgba(0,0,0,0.15); padding: 0.5rem 0.75rem; border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }

.entry-actions { display: flex; gap: 0.5rem; align-items: center; }
.btn-delete-entry { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 0.9rem; padding: 4px; }
.btn-delete-entry:hover { color: #ef4444; }

.btn-primary { background: var(--accent); color: #000; padding: 0.6rem 1.2rem; border-radius: var(--radius-sm); border: none; font-weight: 700; cursor: pointer; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-card); color: var(--text-main); padding: 0.6rem 1.2rem; border-radius: var(--radius-sm); border: 1px solid var(--border-subtle); cursor: pointer; }

.modal { display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.75); backdrop-filter: blur(10px); justify-content: center; align-items: center; z-index: 300; padding: 1rem; }
.modal.active { display: flex; }
.modal-content { background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 2rem; width: 100%; max-width: 480px; }
.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.35rem; }
.form-input { width: 100%; padding: 0.7rem 0.85rem; background: var(--bg-deep); border: 1px solid var(--border-subtle); color: var(--text-main); border-radius: var(--radius-sm); }
.form-input:focus { outline: none; border-color: var(--accent); }

@media (max-width: 768px) {
  header { padding: 0.75rem 1rem; }
  .hero-banner { padding: 1.25rem; }
}

.entry-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.btn-action-icon {
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 4px 7px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.btn-action-icon:hover {
  border-color: var(--accent);
}
.btn-action-icon.btn-del:hover {
  border-color: #ef4444;
  color: #ef4444;
}