:root {
    --bg: #f6f5f1;
    --panel: #ffffff;
    --ink: #1a1a1a;
    --muted: #6b6b68;
    --border: #d8d5cc;
    --border-strong: #b8b5ac;
    --accent: #7a2e2e;
    --accent-hover: #5e2424;
    --warn-bg: #fdf4e3;
    --warn-border: #d9b171;
    --ok: #3a6b3a;
    --bad: #9b3535;
    --serif: Charter, "Iowan Old Style", "Iowan", Georgia, "Times New Roman", serif;
    --mono: "SF Mono", "Menlo", "Consolas", "Courier New", monospace;
  }
  * { box-sizing: border-box; }
  html, body {
    margin: 0; padding: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--serif);
    font-size: 15px;
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
  }
  .app {
    display: grid;
    grid-template-columns: 320px 1fr;
    min-height: 100vh;
  }
  /* Sidebar */
  .sidebar {
    background: var(--panel);
    border-right: 1px solid var(--border);
    padding: 20px;
    position: sticky;
    top: 0;
    align-self: start;
    max-height: 100vh;
    overflow-y: auto;
  }
  .brand {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.01em;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--accent);
    margin-bottom: 16px;
  }
  .brand-sub {
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-top: 2px;
    font-weight: normal;
  }
  .section {
    margin-bottom: 20px;
  }
  .section-label {
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 6px;
    display: block;
  }
  .input, .textarea {
    width: 100%;
    padding: 7px 9px;
    border: 1px solid var(--border);
    background: var(--panel);
    font-family: var(--serif);
    font-size: 14px;
    color: var(--ink);
    border-radius: 2px;
  }
  .input:focus, .textarea:focus {
    outline: none;
    border-color: var(--accent);
  }
  .dropzone {
    border: 2px dashed var(--border-strong);
    padding: 24px 12px;
    text-align: center;
    background: #faf9f5;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
  }
  .dropzone:hover, .dropzone.dragover {
    border-color: var(--accent);
    background: #fbf5f3;
  }
  .dropzone-icon {
    font-size: 22px;
    margin-bottom: 4px;
    color: var(--muted);
  }
  .dropzone-text {
    font-size: 13px;
    color: var(--muted);
  }
  .dropzone-text strong {
    color: var(--ink);
  }
  .btn {
    display: inline-block;
    width: 100%;
    padding: 10px 14px;
    background: var(--accent);
    color: white;
    border: none;
    font-family: var(--serif);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 2px;
    transition: background 0.15s;
    text-align: center;
  }
  .btn:hover:not(:disabled) { background: var(--accent-hover); }
  .btn:disabled {
    background: #bbb7ad;
    cursor: not-allowed;
  }
  .btn-secondary {
    background: var(--panel);
    color: var(--ink);
    border: 1px solid var(--border-strong);
  }
  .btn-secondary:hover:not(:disabled) {
    background: #f0efe9;
    border-color: var(--ink);
  }
  .status {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    margin-top: 8px;
    padding: 6px 8px;
    background: #faf9f5;
    border: 1px solid var(--border);
    min-height: 28px;
  }
  .progress {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--border);
    margin-top: 6px;
    overflow: hidden;
  }
  .progress-bar {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.2s;
  }
  details.help {
    margin-top: 16px;
    font-size: 13px;
    color: var(--muted);
  }
  details.help summary {
    cursor: pointer;
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 4px 0;
  }
  details.help p {
    margin: 6px 0;
  }
  .caption-manager {
    margin-top: 6px;
    max-height: 220px;
    overflow-y: auto;
    border: 1px solid var(--border);
    background: #faf9f5;
  }
  .caption-manager-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    padding: 5px 8px;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    color: var(--ink);
  }
  .caption-manager-row:last-child { border-bottom: none; }
  .caption-manager-row span {
    flex: 1;
    word-break: break-word;
  }
  .caption-manager-row button {
    background: none;
    border: none;
    font-size: 15px;
    color: var(--muted);
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
  }
  .caption-manager-row button:hover { color: var(--bad); }
  .caption-manager-empty {
    padding: 10px 8px;
    font-style: italic;
    color: var(--muted);
    font-size: 12px;
    text-align: center;
  }
  .caption-manager-add {
    display: flex;
    gap: 6px;
    margin-top: 8px;
  }
  .caption-manager-add .input {
    flex: 1;
    font-size: 13px;
    padding: 6px 8px;
  }
  .caption-manager-add .btn {
    width: auto;
    padding: 6px 14px;
    font-size: 13px;
  }

  /* Main */
  .main {
    padding: 20px 24px;
    min-width: 0;
  }
  .main-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
  }
  .main-header h1 {
    margin: 0;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.01em;
  }
  .main-header .count {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
  }
  .empty {
    text-align: center;
    color: var(--muted);
    padding: 80px 20px;
    font-size: 15px;
    font-style: italic;
  }
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 18px;
  }

  /* Photo card */
  .card {
    background: var(--panel);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: relative;
  }
  .card.sortable-ghost {
    opacity: 0.4;
  }
  .card.sortable-chosen {
    box-shadow: 0 0 0 2px var(--accent);
  }
  .card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    border-bottom: 1px solid var(--border);
    background: #faf9f5;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
  }
  .drag-handle {
    cursor: grab;
    padding: 2px 6px;
    user-select: none;
    color: var(--muted);
  }
  .drag-handle:active { cursor: grabbing; }
  .card-index {
    font-weight: 700;
    color: var(--ink);
  }
  .delete-btn {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--muted);
    padding: 0 6px;
    line-height: 1;
  }
  .delete-btn:hover { color: var(--bad); }
  .move-btn {
    background: none;
    border: none;
    font-size: 13px;
    cursor: pointer;
    color: var(--muted);
    padding: 0 4px;
    line-height: 1;
    font-family: var(--mono);
  }
  .move-btn:hover { color: var(--ink); }
  .move-btn:disabled {
    color: #c9c6bc;
    cursor: not-allowed;
  }
  .card-actions {
    display: flex;
    align-items: center;
    gap: 2px;
  }
  .section-row {
    margin-bottom: 8px;
  }
  .section-badge {
    display: inline-block;
    font-family: var(--mono);
    font-size: 10px;
    padding: 3px 8px;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    cursor: pointer;
    border: none;
    border-radius: 2px;
    font-weight: 600;
  }
  .section-badge:hover { opacity: 0.88; }
  .section-badge.sec-ext_approach { background: #4a6b8a; }
  .section-badge.sec-site         { background: #6b7a3a; }
  .section-badge.sec-building_ext { background: #7a2e2e; }
  .section-badge.sec-interior     { background: #5e4a7a; }
  .section-badge.sec-other        { background: #6b6b68; }
  .section-badge .override-dot {
    display: inline-block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: white;
    margin-left: 5px;
    vertical-align: middle;
    opacity: 0.85;
  }

  .thumb-wrap {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #222;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .thumb {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
  }

  .card-body {
    padding: 10px;
  }
  .card-filename {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 6px;
    word-break: break-all;
  }
  .badges {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
    flex-wrap: wrap;
  }
  .badge {
    font-family: var(--mono);
    font-size: 10px;
    padding: 2px 6px;
    border: 1px solid var(--border);
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
  .badge.ok {
    color: var(--ok);
    border-color: var(--ok);
  }
  .badge.bad {
    color: var(--bad);
    border-color: var(--bad);
  }
  .caption-row {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 8px;
  }
  .caption-row .input {
    width: 100%;
  }
  .caption-row select {
    width: 100%;
    padding: 6px 8px;
    font-family: var(--serif);
    font-size: 13px;
    border: 1px solid var(--border);
    background: var(--panel);
    cursor: pointer;
    border-radius: 2px;
    color: var(--muted);
  }
  .sliders {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 4px 8px;
    align-items: center;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
  }
  .sliders input[type=range] {
    width: 100%;
  }
  .slider-val {
    min-width: 28px;
    text-align: right;
    color: var(--ink);
  }

  .heic-warn {
    background: var(--warn-bg);
    border: 1px solid var(--warn-border);
    padding: 10px 12px;
    margin-bottom: 16px;
    font-size: 13px;
  }
  .heic-warn strong { display: block; margin-bottom: 4px; }

  /* Map */
  .map-toggle-row {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .toggle-map-btn {
    background: var(--panel);
    color: var(--ink);
    border: 1px solid var(--border-strong);
    padding: 5px 12px;
    font-family: var(--serif);
    font-size: 13px;
    cursor: pointer;
    border-radius: 2px;
  }
  .toggle-map-btn:hover { background: #f0efe9; }
  .toggle-map-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
  }
  #mapContainer {
    margin-bottom: 18px;
    border: 1px solid var(--border);
    background: var(--panel);
  }
  .map-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: #faf9f5;
    border-bottom: 1px solid var(--border);
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
  }
  .map-toolbar button {
    background: var(--panel);
    color: var(--ink);
    border: 1px solid var(--border-strong);
    padding: 3px 10px;
    font-family: var(--serif);
    font-size: 11px;
    cursor: pointer;
    border-radius: 2px;
  }
  .map-toolbar button:hover { background: #f0efe9; }
  #map {
    height: 480px;
    width: 100%;
  }
  /* Leaflet's default marker pane sits above tile layer — our divIcon has no
     background, so the SVG renders directly. */
  .photo-marker-icon { background: none; border: none; }
  .photo-marker-svg {
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.45));
  }
  .map-popup {
    text-align: center;
    font-family: var(--serif);
    min-width: 180px;
  }
  .map-popup-num {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 4px;
  }
  .map-popup-thumb-wrap {
    width: 200px;
    height: 140px;
    margin: 0 auto 6px;
    background: #222;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .map-popup-thumb {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
  }
  .map-popup-filename {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
    margin-bottom: 2px;
    word-break: break-all;
  }
  .map-popup-caption {
    font-size: 13px;
    margin-bottom: 8px;
    font-style: italic;
    color: var(--ink);
  }
  .map-popup-jump {
    background: var(--accent);
    color: white;
    border: none;
    padding: 4px 12px;
    font-family: var(--serif);
    font-size: 12px;
    cursor: pointer;
    border-radius: 2px;
  }
  .map-popup-jump:hover { background: var(--accent-hover); }
  .card.flash {
    animation: cardFlash 1.4s ease-out;
  }
  @keyframes cardFlash {
    0%   { box-shadow: 0 0 0 3px var(--accent); }
    50%  { box-shadow: 0 0 0 3px var(--accent); }
    100% { box-shadow: 0 0 0 0 transparent; }
  }
  .checkbox-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--ink);
    cursor: pointer;
    user-select: none;
  }
  .checkbox-row input { margin: 0; }

  .restore-notice {
    background: #eef3e3;
    border: 1px solid #9fb37a;
    padding: 10px 12px;
    margin-bottom: 16px;
    font-size: 13px;
    color: var(--ink);
  }
  .restore-notice strong { display: block; margin-bottom: 6px; font-weight: 600; }
  .restore-actions {
    display: flex;
    gap: 6px;
  }
  .restore-actions .btn {
    flex: 1;
    padding: 6px 8px;
    font-size: 13px;
  }

  .oss-list {
    margin: 6px 0 0 0;
    padding-left: 18px;
    font-size: 12px;
    line-height: 1.55;
  }
  .oss-list li { margin-bottom: 2px; }
  .oss-list a { color: var(--ink); text-decoration: underline; }
  .oss-list a:hover { color: var(--accent); }

  .copyright {
    margin-top: 18px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.04em;
    color: var(--muted);
    text-align: center;
  }

  code {
    font-family: var(--mono);
    font-size: 0.9em;
    background: rgba(0, 0, 0, 0.05);
    padding: 1px 4px;
    border-radius: 2px;
  }

  /* Per-card banner shown while a photo's reverse-geocode is in flight.
     Explains to the user why some quick-caption options are temporarily
     disabled and that the auto-caption will fill in shortly. */
  .geo-pending-banner {
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    background: rgba(122, 46, 46, 0.07);
    border-left: 2px solid var(--accent);
    padding: 5px 8px;
    margin-bottom: 8px;
    animation: pendingPulse 1.4s ease-in-out infinite;
  }
  .geo-pending-banner .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
  }

  /* Pending-geocode badge — pulses while the lookup is in flight. */
  .badge.badge-pending {
    color: var(--accent);
    border-color: var(--accent);
    animation: pendingPulse 1.2s ease-in-out infinite;
  }
  @keyframes pendingPulse {
    0%, 100% { opacity: 0.55; }
    50%      { opacity: 1; }
  }

  /* Full-page drop overlay — shown when a file drag enters the document. */
  #dropOverlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 26, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    pointer-events: none; /* must not intercept the actual drop target */
    opacity: 0;
    transition: opacity 0.15s ease-out;
  }
  #dropOverlay.visible { opacity: 1; }
  .drop-overlay-inner {
    background: var(--panel);
    border: 3px dashed var(--accent);
    padding: 36px 56px;
    text-align: center;
    font-family: var(--serif);
    font-size: 22px;
    color: var(--ink);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  }
  .drop-overlay-sub {
    margin-top: 8px;
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
  }

  @media (max-width: 720px) {
    .app { grid-template-columns: 1fr; }
    .sidebar { position: static; max-height: none; border-right: none; border-bottom: 1px solid var(--border); }
    #map { height: 360px; }
  }