:root {
  --bg: #0f1115;
  --panel: #161a22;
  --panel-2: #1d222c;
  --border: #2a313d;
  --text: #e6e8ec;
  --muted: #8a93a4;
  --accent: #4f8cff;
  --accent-hover: #6ea0ff;
  --danger: #ff6b6b;
  --ok: #4ade80;
  --warn: #fbbf24;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  -webkit-text-size-adjust: 100%;
}

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  min-height: 100vh;
  min-height: 100dvh;
}

.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  max-height: 100vh;
  max-height: 100dvh;
}

.sidebar h1 {
  font-size: 18px;
  margin: 0 0 16px 0;
  letter-spacing: 0.3px;
}

.block {
  margin-bottom: 24px;
}

.block h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
  margin: 0 0 10px 0;
  font-weight: 600;
}

.row {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.row.checkbox {
  grid-template-columns: auto 1fr;
  align-items: start;
  font-size: 13px;
  color: var(--muted);
}
.row.checkbox input { margin-top: 3px; }

select, input[type=number], input[type=text], textarea {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 8px;
  border-radius: 6px;
  outline: none;
  font: inherit;
}
select:focus, input:focus, textarea:focus { border-color: var(--accent); }

button {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  transition: background 0.15s, border-color 0.15s;
}
button:hover:not(:disabled) { background: #232a36; border-color: #3a4252; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
button.ghost { background: transparent; }

.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover { border-color: var(--accent); background: rgba(79, 140, 255, 0.08); }
.dropzone p { margin: 0; line-height: 1.5; }
.dropzone .link { color: var(--accent); cursor: pointer; text-decoration: underline; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}
.chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 6px 4px 4px;
  font-size: 12px;
  max-width: 100%;
}
.chip img {
  width: 28px;
  height: 28px;
  object-fit: cover;
  border-radius: 3px;
}
.chip .name {
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chip .x {
  background: transparent;
  border: 0;
  color: var(--muted);
  padding: 2px 4px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
.chip .x:hover { color: var(--danger); }
.chip.source-history { border-color: #3a5a8a; }

.actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.actions button { flex: 1 1 auto; font-size: 12px; padding: 6px 8px; }

.history {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: 6px;
  margin-bottom: 8px;
  max-height: 220px;
  overflow-y: auto;
}
.history-item {
  position: relative;
  aspect-ratio: 1;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  background: var(--panel-2);
}
.history-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.history-item:hover { border-color: var(--accent); }
.history-item.selected { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(79, 140, 255, 0.4); }
.history-item .idx {
  position: absolute;
  top: 2px;
  left: 2px;
  font-size: 10px;
  background: rgba(0,0,0,0.6);
  padding: 1px 4px;
  border-radius: 3px;
}

.main {
  padding: 16px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
  min-width: 0;
  overflow: hidden;
}

.prompt-block {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
textarea#prompt {
  width: 100%;
  resize: vertical;
  min-height: 60px;
  font: inherit;
}
.prompt-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}
.mode-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 4px 8px;
  border-radius: 4px;
}
.mode-generate { background: rgba(74, 222, 128, 0.15); color: var(--ok); }
.mode-edit { background: rgba(251, 191, 36, 0.15); color: var(--warn); }
.status { color: var(--muted); flex: 1; }
.status.error { color: var(--danger); }

.result-block {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 12px;
  min-width: 0;
  overflow: hidden;
}
.result {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
  min-height: 200px;
  overflow: auto;
}
.result.placeholder { color: var(--muted); }
.result img {
  max-width: 100%;
  max-height: 70vh;
  max-height: 70dvh;
  object-fit: contain;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel-2);
}
.result .image-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}
.result .image-card .image-actions {
  display: flex;
  gap: 6px;
  font-size: 12px;
}
.result .image-card .revised {
  font-size: 11px;
  color: var(--muted);
  max-width: 360px;
  text-align: center;
}
.result .image-card .saved-path {
  font-size: 11px;
  color: var(--muted);
}
.result .image-card .saved-path code,
.meta code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 1px 4px;
  border-radius: 3px;
  color: var(--text);
  font-size: 11px;
}

.meta {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}
.meta .pill {
  display: inline-block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  margin-right: 4px;
  color: var(--text);
}
.meta table { border-collapse: collapse; margin-top: 6px; }
.meta td { padding: 2px 8px 2px 0; }
.meta .input-row td:first-child { color: var(--text); }

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 16px 0;
}
.sidebar-header h1 { margin: 0; }
.sidebar-header .logout-form { margin: 0; }
.sidebar-header .logout-form button {
  font-size: 12px;
  padding: 4px 10px;
}

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 16px;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  width: 100%;
  max-width: 320px;
}
.login-card h1 {
  margin: 0 0 4px;
  font-size: 18px;
}
.login-card .login-sub {
  margin: 0 0 16px;
  font-size: 12px;
  color: var(--muted);
}
.login-card .login-row {
  display: block;
  margin-bottom: 12px;
}
.login-card .login-row span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
}
.login-card input { width: 100%; }
.login-card .login-error {
  color: var(--danger);
  font-size: 12px;
  margin-bottom: 12px;
}
.login-card button { width: 100%; margin-top: 4px; }

@media (max-width: 768px) {
  html, body { font-size: 15px; }

  .layout {
    display: block;
    min-height: auto;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: none;
    overflow: visible;
    padding: 12px;
  }

  .sidebar h1 { font-size: 17px; }

  .main {
    padding: 12px;
    grid-template-rows: auto auto;
    overflow: visible;
  }

  .result-block { overflow: visible; }
  .result { overflow: visible; }

  .block { margin-bottom: 18px; }

  .row {
    grid-template-columns: 1fr;
    gap: 4px;
    margin-bottom: 12px;
  }
  .row > span { color: var(--muted); font-size: 12px; }

  .row.checkbox {
    grid-template-columns: auto 1fr;
    gap: 8px;
    align-items: center;
  }

  select,
  input[type=number],
  input[type=text],
  textarea {
    padding: 10px 12px;
    font-size: 16px; /* iOS: prevents page zoom on focus */
    min-height: 44px;
  }
  textarea#prompt { min-height: 96px; }

  button {
    padding: 12px 14px;
    min-height: 44px;
  }
  .actions button { padding: 10px 12px; font-size: 13px; }

  .dropzone { padding: 18px; font-size: 14px; }

  .prompt-bar {
    flex-wrap: wrap;
    gap: 8px;
  }
  .status { flex: 1 1 100%; order: 3; }
  .prompt-bar button.primary { flex: 1 1 auto; }

  .history {
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    max-height: 180px;
  }
  .chip .name { max-width: 60vw; }

  .result img { max-height: 60vh; max-height: 60dvh; }

  .sidebar-header h1 { font-size: 16px; }
  .sidebar-header .logout-form button { padding: 8px 12px; font-size: 13px; }

  .meta { font-size: 12px; }
  .meta table { font-size: 11px; }
}

@media (max-width: 380px) {
  .actions { flex-direction: column; }
}