*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* =====================
   THÈME SOMBRE (défaut)
   ===================== */
:root,
[data-theme="dark"] {
  --bg: #0f0f11;
  --surface: #18181c;
  --surface-2: #222228;
  --border: #2e2e36;
  --accent: #7c6af7;
  --accent-hover: #9585ff;
  --text: #e8e8f0;
  --text-muted: #7a7a8c;
  --success: #4ade80;
  --error: #f87171;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

/* =====================
   THÈME CLAIR
   ===================== */
[data-theme="light"] {
  --bg: #f4f4f8;
  --surface: #ffffff;
  --surface-2: #f0f0f5;
  --border: #dcdce8;
  --accent: #6355e0;
  --accent-hover: #7c6af7;
  --text: #1a1a2e;
  --text-muted: #6b6b80;
  --success: #16a34a;
  --error: #dc2626;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

:root {
  --radius: 10px;
  --font: "Segoe UI", system-ui, sans-serif;
  --mono: "Cascadia Code", "Fira Code", "Consolas", monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem;
  transition: background 0.25s, color 0.25s;
}

.container {
  width: 100%;
  max-width: 780px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* =====================
   HEADER
   ===================== */
header {
  padding: 0.5rem 0;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-brand {
  text-align: left;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #a8b4ff, #7c6af7, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-muted);
  margin-top: 0.3rem;
  font-size: 0.95rem;
}

/* Toggle thème */
#theme-toggle {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

#theme-toggle:hover {
  border-color: var(--accent);
  transform: rotate(15deg);
}

/* =====================
   CARDS
   ===================== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow);
  transition: background 0.25s, border-color 0.25s;
}

label[for="user-idea"] {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

textarea {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 0.85rem 1rem;
  resize: vertical;
  transition: border-color 0.2s, background 0.25s;
  line-height: 1.6;
  min-height: 110px;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea::placeholder {
  color: var(--text-muted);
}

/* =====================
   OPTIONS ROW
   ===================== */
.options-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.format-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.format-group .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-right: 0.15rem;
}

.chip {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.3rem 0.7rem;
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  user-select: none;
}

.chip:has(input:checked) {
  border-color: var(--accent);
  background: rgba(124, 106, 247, 0.12);
  color: var(--accent-hover);
}

.chip input[type="radio"] {
  accent-color: var(--accent);
}

/* =====================
   BOUTONS
   ===================== */
button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  font-family: var(--font);
  font-weight: 600;
  transition: background 0.2s, opacity 0.2s, transform 0.1s;
}

#generate-btn {
  background: var(--accent);
  color: #fff;
  padding: 0.65rem 1.4rem;
  font-size: 0.95rem;
  white-space: nowrap;
}

#generate-btn:hover {
  background: var(--accent-hover);
}

#generate-btn:active {
  transform: scale(0.97);
}

#generate-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
}

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

/* =====================
   OUTPUT
   ===================== */
.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.format-badge {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: rgba(124, 106, 247, 0.15);
  color: var(--accent-hover);
  border: 1px solid rgba(124, 106, 247, 0.3);
  border-radius: 20px;
  padding: 0.25rem 0.7rem;
}

.output-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

#output-content {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 60vh;
  overflow-y: auto;
  color: var(--text);
  transition: background 0.25s;
}

/* =====================
   LOADER
   ===================== */
#generate-btn.loading::after {
  content: "";
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
}

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

/* =====================
   ERREUR
   ===================== */
.error-box {
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--error);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
}

/* =====================
   FOOTER
   ===================== */
footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding-bottom: 1rem;
}

footer a {
  color: var(--accent-hover);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* =====================
   HISTORIQUE
   ===================== */
#history-section {
  gap: 0.75rem;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.history-header h2 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.history-empty {
  color: var(--text-muted);
  font-size: 0.87rem;
  text-align: center;
  padding: 1rem 0;
}

#history-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.history-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  transition: border-color 0.2s, background 0.25s;
}

.history-item:hover {
  border-color: var(--accent);
}

.history-item-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.history-format-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  background: rgba(124, 106, 247, 0.15);
  color: var(--accent-hover);
  border: 1px solid rgba(124, 106, 247, 0.25);
  border-radius: 20px;
  padding: 0.15rem 0.55rem;
}

.history-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.history-idea {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item-actions {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.2rem;
  flex-wrap: wrap;
}

/* =====================
   SCROLLBAR
   ===================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* =====================
   RESPONSIVE MOBILE
   ===================== */
@media (max-width: 600px) {
  body {
    padding: 1rem 0.75rem;
  }

  .container {
    gap: 1rem;
  }

  header h1 {
    font-size: 1.5rem;
  }

  .subtitle {
    font-size: 0.85rem;
  }

  #theme-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .card {
    padding: 1rem;
    gap: 0.85rem;
  }

  /* Format chips : scroll horizontal sur mobile */
  .options-row {
    flex-direction: column;
    align-items: stretch;
  }

  .format-group {
    overflow-x: auto;
    padding-bottom: 0.25rem;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  .format-group .label {
    flex-shrink: 0;
  }

  .chip {
    flex-shrink: 0;
  }

  #generate-btn {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    justify-content: center;
  }

  /* Output actions : pleine largeur */
  .output-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .output-actions {
    width: 100%;
  }

  .output-actions button {
    flex: 1;
    text-align: center;
  }

  #output-content {
    font-size: 0.8rem;
    max-height: 50vh;
  }

  /* Historique */
  .history-item-actions {
    flex-direction: row;
  }

  .history-item-actions button {
    flex: 1;
    text-align: center;
  }

  footer {
    font-size: 0.75rem;
  }
}

@media (max-width: 380px) {
  header h1 {
    font-size: 1.3rem;
  }

  .card {
    padding: 0.85rem;
  }
}