/* ── Reset & Base ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; background: #f5f5f5; color: #1a1a1a; min-height: 100vh; }

/* ── Persistent Header ────────────────────────────────────────────── */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  height: 48px; padding: 0 20px;
  background: #004042; color: #fff;
}
.app-header .header-left { display: flex; align-items: center; gap: 14px; }
.app-header .back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: #fff; text-decoration: none; font-size: 13px; font-weight: 600;
  padding: 5px 14px 5px 10px;
  border: 1px solid rgba(255,255,255,0.3); border-radius: 20px;
  background: rgba(255,255,255,0.08);
  transition: background 0.15s, border-color 0.15s;
}
.app-header .back-link svg { width: 16px; height: 16px; fill: currentColor; }
.app-header .back-link:hover { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.6); }
.app-header .app-title { font-size: 16px; font-weight: 700; letter-spacing: 0.2px; }
.app-header .header-right { display: flex; align-items: center; gap: 12px; }
.app-header .user-name { font-size: 13px; opacity: 0.85; }
.app-header .sign-out-link {
  color: #fff; font-size: 13px; font-weight: 600; text-decoration: none;
  padding: 5px 14px; border: 1px solid rgba(255,255,255,0.35); border-radius: 20px;
  transition: background 0.15s, border-color 0.15s; cursor: pointer; background: none;
}
.app-header .sign-out-link:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.6); }
.app-header .help-link {
  color: #fff; font-size: 13px; font-weight: 600; text-decoration: none;
  padding: 5px 14px; border: 1px solid rgba(255,255,255,0.35); border-radius: 20px;
  transition: background 0.15s, border-color 0.15s; cursor: pointer; background: none;
}
.app-header .help-link:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.6); }
.app-header .help-link.active { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.7); }

/* ── Help Slide-Out Panel ─────────────────────────────────────────── */
.help-panel {
  position: fixed; top: 48px; right: 0; bottom: 0; width: 480px;
  background: #fff; z-index: 1000;
  transform: translateX(100%); transition: transform 0.25s ease;
  box-shadow: -4px 0 20px rgba(0,0,0,0.15);
  display: flex; flex-direction: column;
}
.help-panel.open { transform: translateX(0); }
.help-panel-header {
  padding: 10px 16px; font-size: 14px; font-weight: 700; color: #004042;
  border-bottom: 1px solid #e5e5e5; background: #fff;
  display: flex; align-items: center; justify-content: space-between; flex-shrink: 0;
}
.help-panel-header button {
  background: none; border: none; cursor: pointer; font-size: 20px;
  color: #888; padding: 2px 6px; border-radius: 4px; line-height: 1;
}
.help-panel-header button:hover { background: #eee; color: #333; }
.help-panel iframe { flex: 1; width: 100%; border: none; }

/* ── Upload View ───────────────────────────────────────────────────── */
.upload-view { max-width: 680px; margin: 40px auto; padding: 0 20px; }
.upload-view h1 { font-size: 24px; font-weight: 700; margin-bottom: 8px; }
.upload-view .subtitle { color: #666; margin-bottom: 32px; }

.dropzone {
  border: 2px dashed #ccc; border-radius: 8px; padding: 32px; text-align: center;
  cursor: pointer; transition: border-color 0.15s, background 0.15s; margin-bottom: 16px;
  background: #fff;
}
.dropzone:hover, .dropzone.dragover { border-color: #004042; background: #f0fafa; }
.dropzone.has-file { border-color: #02827a; background: #f0fdf4; }
.dropzone .label { font-weight: 600; margin-bottom: 4px; }
.dropzone .hint { font-size: 13px; color: #888; }
.dropzone .filename { font-size: 13px; color: #02827a; font-weight: 600; margin-top: 8px; }
.dropzone input[type="file"] { display: none; }

.btn-generate {
  display: block; width: 100%; padding: 14px; margin-top: 24px;
  background: #004042; color: #fff; border: none; border-radius: 6px;
  font-size: 15px; font-weight: 700; cursor: pointer; text-transform: uppercase;
  letter-spacing: 0.5px; transition: background 0.15s;
}
.btn-generate:hover { background: #005a5e; }
.btn-generate:disabled { background: #999; cursor: not-allowed; }

.campaign-selector {
  background: #fff; border: 1px solid #e5e5e5; border-radius: 6px; padding: 12px 16px; margin-top: 16px;
}
.campaign-selector label { font-weight: 600; font-size: 14px; margin-right: 8px; }
.campaign-selector select {
  width: 100%; margin-top: 6px; padding: 8px 10px; font-size: 14px;
  border: 1px solid #ccc; border-radius: 4px; background: #fff;
}
.utm-warnings {
  background: #fff8e1; border: 1px solid #ffe082; border-radius: 6px; padding: 10px 14px; margin-top: 12px;
  font-size: 13px; color: #5d4037;
}
.utm-warnings strong { color: #e65100; }

.error-box { background: #fef2f2; border: 1px solid #fca5a5; border-radius: 6px; padding: 12px 16px; margin-top: 16px; color: #991b1b; font-size: 14px; }

/* ── Review View ───────────────────────────────────────────────────── */
.review-view { display: flex; height: calc(100vh - 48px); }

.sidebar {
  width: 220px; background: #fff; border-right: 1px solid #e5e5e5;
  overflow-y: auto; flex-shrink: 0; padding: 16px 0;
}
.sidebar h2 { font-size: 13px; text-transform: uppercase; color: #888; padding: 0 16px; margin-bottom: 12px; letter-spacing: 0.5px; }
.sidebar-item {
  padding: 10px 16px; cursor: pointer; font-size: 14px;
  border-left: 3px solid transparent; transition: background 0.1s;
}
.sidebar-item:hover { background: #f5f5f5; }
.sidebar-item.active { background: #f0fafa; border-left-color: #004042; font-weight: 600; }
.sidebar-item .email-date { font-size: 12px; color: #888; }

.main-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.toolbar { padding: 12px 20px; background: #fff; border-bottom: 1px solid #e5e5e5; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.segment-pills { display: flex; gap: 6px; flex-wrap: wrap; }
.seg-pill {
  padding: 5px 14px; border-radius: 20px; font-size: 13px; font-weight: 600;
  cursor: pointer; border: 1px solid #ddd; background: #fff; transition: all 0.1s;
}
.seg-pill:hover { border-color: #004042; }
.seg-pill.active { background: #004042; color: #fff; border-color: #004042; }

.meta-card {
  margin: 12px 20px 0; padding: 12px 16px; background: #fff; border-radius: 6px;
  border: 1px solid #e5e5e5; font-size: 13px; display: grid;
  grid-template-columns: auto 1fr; gap: 4px 12px;
}
.meta-card dt { font-weight: 600; color: #666; }
.meta-card dd { color: #1a1a1a; display: flex; align-items: center; gap: 4px; }
.copy-btn { flex-shrink: 0; background: none; border: none; cursor: pointer; padding: 2px 3px; color: #bbb; border-radius: 3px; line-height: 1; transition: color .15s; }
.copy-btn:hover { color: #555; background: #f0f0f0; }
.copy-btn svg { display: block; width: 13px; height: 13px; }
.copy-btn .check-icon { display: none; }
.copy-btn.copied { color: #16a34a; }
.copy-btn.copied .copy-icon { display: none; }
.copy-btn.copied .check-icon { display: block; }

.editor-area { flex: 1; padding: 12px 20px; overflow: hidden; display: flex; flex-direction: column; }
.editor-area textarea {
  flex: 1; width: 100%; font-family: 'Consolas', 'Monaco', monospace; font-size: 12px;
  line-height: 1.5; padding: 12px; border: 1px solid #e5e5e5; border-radius: 6px;
  resize: none; background: #fff;
}

/* ── Preview Panel ─────────────────────────────────────────────────── */
.editor-preview-container { flex: 1; display: flex; flex-direction: row; overflow: hidden; }
.editor-preview-container .editor-area { flex: 1; min-width: 0; }
.preview-panel {
  flex: 1; display: flex; flex-direction: column;
  border-left: 1px solid #e5e5e5; background: #f9f9f9; min-width: 0;
}
.preview-panel .preview-header {
  padding: 8px 16px; font-size: 13px; font-weight: 600; color: #666;
  text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid #e5e5e5;
  background: #fff; display: flex; align-items: center; justify-content: space-between;
}
.preview-panel .btn-close-preview {
  background: none; border: none; cursor: pointer; font-size: 18px;
  color: #888; padding: 2px 6px; border-radius: 4px; line-height: 1;
}
.preview-panel .btn-close-preview:hover { background: #eee; color: #333; }
.preview-panel iframe { flex: 1; width: 100%; border: none; background: #fff; }
.toolbar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.btn-preview {
  padding: 5px 14px; border-radius: 20px; font-size: 13px; font-weight: 600;
  cursor: pointer; border: 1px solid #ddd; background: #fff; transition: all 0.1s;
}
.btn-preview:hover { border-color: #004042; }
.btn-preview.active { background: #004042; color: #fff; border-color: #004042; }

.action-bar { padding: 12px 20px; background: #fff; border-top: 1px solid #e5e5e5; display: flex; gap: 8px; }
.btn-action {
  padding: 8px 20px; border-radius: 4px; font-size: 13px; font-weight: 600;
  cursor: pointer; border: 1px solid #ddd; background: #fff; transition: all 0.1s;
}
.btn-action:hover { background: #f5f5f5; }
.btn-action.primary { background: #004042; color: #fff; border-color: #004042; }
.btn-action.primary:hover { background: #005a5e; }

/* ── Copy Toast ───────────────────────────────────────────────────── */
.copy-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    z-index: 9999;
    padding: 12px 24px;
    border-radius: 8px;
    background: #004042;
    color: #fff;
    font-size: 36px;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    opacity: 0;
    transform: translateX(-50%);
    transition: opacity 0.3s, transform 0.3s;
    pointer-events: none;
}
.copy-toast.show { opacity: 1; }
.editor-area textarea.flash-copied { background: #ecfdf5; transition: background 0.15s; }

/* ── Debug View ────────────────────────────────────────────────────── */
.debug-output { max-width: 900px; margin: 20px auto; padding: 0 20px; }
.debug-output pre { background: #fff; padding: 16px; border-radius: 6px; border: 1px solid #e5e5e5; font-size: 12px; overflow-x: auto; white-space: pre-wrap; }