/* ============================================================
   PDF Date Stamper - Styles
   ============================================================ */

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

:root {
  --sidebar-w: 240px;
  --accent: #2a7fd4;
  --accent-hover: #1a6fc4;
  --danger: #d9534f;
  --danger-hover: #c9302c;
  --success: #27a84e;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --border: #dde1e7;
  --text: #1e2330;
  --text-muted: #6b7280;
  --sidebar-bg: #1e2330;
  --sidebar-text: #c9d1e0;
  --sidebar-active: #2a7fd4;
  --radius: 8px;
  --shadow: 0 1px 4px rgba(0,0,0,0.10);
}

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

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 20px 16px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-header h1 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.sidebar-section {
  padding: 12px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  padding: 4px 4px 2px;
}

.profile-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-height: 40px;
}

.profile-list li {
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--sidebar-text);
  transition: background 0.15s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.profile-list li:hover {
  background: rgba(255,255,255,0.07);
}

.profile-list li.active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 600;
}

/* ---- Main ---- */
.main {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ---- Empty state ---- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 40px;
}

.empty-icon { font-size: 64px; }
.empty-state h2 { font-size: 22px; color: var(--text); }
.empty-state p { font-size: 14px; max-width: 360px; }

/* ---- Profile panel ---- */
.profile-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.panel-topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  flex-shrink: 0;
}

.panel-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.panel-heading {
  font-size: 18px;
  font-weight: 700;
  flex: 1;
  min-width: 160px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.save-status {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  min-height: 16px;
}

.save-status.ok { color: var(--success); }
.save-status.err { color: var(--danger); }

.panel-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ---- Editor column ---- */
.editor-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 16px;
  gap: 10px;
}

.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.pdf-filename {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.canvas-wrapper {
  flex: 1;
  overflow: auto;
  background: #888;
  border-radius: var(--radius);
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.canvas-placeholder {
  color: #ccc;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 300px;
  text-align: center;
  padding: 20px;
}

#pdf-canvas {
  display: block;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

/* ---- Stamp overlay ---- */
.stamp-overlay {
  position: absolute;
  background: rgba(255, 255, 180, 0.85);
  border: 2px dashed #2255aa;
  border-radius: 3px;
  padding: 2px 6px;
  cursor: grab;
  user-select: none;
  white-space: nowrap;
  line-height: 1.4;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  z-index: 10;
}

.stamp-overlay:active { cursor: grabbing; }

.hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* ---- Settings column ---- */
.settings-col {
  width: 280px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  background: var(--surface);
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.settings-group {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.settings-group:last-child { border-bottom: none; }

.settings-group-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.form-row label {
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
}

.input-row { display: flex; gap: 6px; }

.text-input, .select-input, .number-input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 13px;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color 0.2s;
}

.text-input:focus, .select-input:focus, .number-input:focus {
  border-color: var(--accent);
}

.number-input { width: 70px; }

.color-input {
  width: 44px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  padding: 2px;
}

.checkbox-row {
  display: flex;
  gap: 14px;
  font-size: 13px;
}

.checkbox-row label {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.format-preview {
  font-size: 12px;
  color: var(--text-muted);
}

.pages-summary {
  font-size: 13px;
  color: var(--text);
}

.position-display {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

/* ---- Buttons ---- */
.btn {
  padding: 7px 14px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: #eef0f4;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: #e3e6ec; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-export {
  background: var(--success);
  color: #fff;
  font-size: 14px;
  padding: 8px 18px;
}
.btn-export:hover { background: #1e9040; }
.btn-export:disabled { background: #aaa; cursor: not-allowed; }

.btn-sm { padding: 4px 10px; font-size: 12px; }

.full-width { width: 100%; }

.upload-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
  width: 340px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-sm { width: 260px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 15px; }

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}

.modal-body {
  padding: 16px 18px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-body.center {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
}

.modal-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.page-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
  max-height: 300px;
  overflow-y: auto;
}

.page-checkboxes label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
}

/* ---- Spinner ---- */
.spinner {
  width: 36px;
  height: 36px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ---- Utility ---- */
.hidden { display: none !important; }