/* xpost chrome: app shell layout */
/* CONTRACT: uses base.css tokens only */

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-3) var(--sp-4);
  height: 72px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.brand-mark {
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.brand-text small {
  font-size: 13px;
  color: var(--text-muted);
}

.lang-toggle {
  padding: var(--sp-2) var(--sp-3);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  cursor: pointer;
}

.lang-toggle:hover {
  background: var(--surface-2);
}

.lang-toggle:focus-visible {
  box-shadow: var(--ring);
}

.app-main {
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
  gap: var(--sp-6);
  padding: var(--sp-6) var(--sp-4);
  align-items: start;
}

/* Editor panel */
.editor {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-4);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  max-height: calc(100dvh - 180px);
  overflow-y: auto;
}

.editor .field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.editor .field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}

.editor .field-row .field {
  margin: 0;
}

.editor .label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.editor .avatar-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.editor .avatar-preview {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.editor .avatar-presets {
  display: flex;
  gap: var(--sp-2);
}

.editor .avatar-preset {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--border);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.editor .avatar-preset:hover {
  transform: scale(1.05);
}

.editor .avatar-preset:focus-visible {
  box-shadow: var(--ring);
}

.editor .avatar-preset.g1 { background: linear-gradient(135deg, #6366f1, #a855f7); }
.editor .avatar-preset.g2 { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.editor .avatar-preset.g3 { background: linear-gradient(135deg, #10b981, #3b82f6); }
.editor .avatar-preset.g4 { background: linear-gradient(135deg, #f59e0b, #ef4444); }

.editor fieldset.seg-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: var(--sp-3);
}

.editor fieldset.seg-group legend {
  font-size: 13px;
  font-weight: 500;
  padding: 0 var(--sp-2);
  color: var(--text);
}

.editor .seg {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  border-radius: var(--r-pill);
  transition: background-color 0.15s ease;
}

.editor .seg:hover {
  background: var(--accent-soft);
}

.editor .seg input[type="radio"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.editor .seg input[type="radio"]::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  transform: scale(0);
  transition: transform 0.15s ease;
}

.editor .seg input[type="radio"]:checked {
  border-color: var(--accent);
  color: var(--accent);
}

.editor .seg input[type="radio"]:checked::before {
  transform: scale(1);
}

.editor .seg input[type="radio"]:focus-visible {
  box-shadow: var(--ring);
}

.editor .media-drop {
  border: 2px dashed var(--border);
  border-radius: var(--r-card);
  padding: var(--sp-4);
}

.editor .media-drop .file-btn {
  cursor: pointer;
}

.editor .media-preview {
  margin-top: var(--sp-3);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  gap: var(--sp-2);
}

.editor .metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: var(--sp-3);
}

.editor .metrics legend {
  font-size: 13px;
  font-weight: 500;
  padding: 0 var(--sp-2);
  color: var(--text);
  grid-column: 1 / -1;
  margin-bottom: var(--sp-2);
}

.editor .metric {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.editor .metric span {
  font-size: 13px;
  color: var(--text-muted);
}

.editor .presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.editor .presets-aux {
  display: flex;
  gap: var(--sp-3);
}

.editor .switch-field {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3);
  cursor: pointer;
}

.editor .switch-field input[type="checkbox"] {
  appearance: none;
  width: 40px;
  height: 20px;
  background: var(--border);
  border-radius: 9999px;
  position: relative;
  transition: background 0.2s ease;
  cursor: pointer;
}

.editor .switch-field input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s ease, background 0.2s ease;
}

.editor .switch-field input[type="checkbox"]:checked {
  background: var(--accent);
}

.editor .switch-field input[type="checkbox"]:checked::after {
  transform: translateX(20px);
}

.editor .export-status {
  font-size: 13px;
  color: var(--text-muted);
  min-height: 18px;
}

/* Preview panel */
.preview {
  position: relative;
}

.preview-wrap {
  position: sticky;
  top: 80px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.preview .x-post {
  width: 100%;
  max-width: 500px;
}

/* Footer */
.app-footer {
  padding: var(--sp-4) var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.app-footer .disclaimer {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--sp-2);
}

.app-footer .foot-meta {
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* Mobile: single column, preview after editor */
@media (max-width: 767px) {
  .app-header {
    padding: var(--sp-3);
  }

  .app-main {
    display: flex;
    flex-direction: column;
    padding: var(--sp-4);
  }

  .editor {
    max-height: none;
  }

  .preview-wrap {
    position: static;
  }

  .preview-wrap .x-post {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .editor .avatar-preset,
  .editor .seg input[type="radio"]::before,
  .editor .switch-field input[type="checkbox"]::after {
    transition-duration: 0.001ms !important;
  }
}