/* ===================== Design tokens ===================== */
:root {
  --bg: #0b0f17;
  --bg-elev-1: #101623;
  --bg-elev-2: #151d2e;
  --bg-elev-3: #1b2537;
  --border: #23304a;
  --border-soft: #1a2436;

  --text: #e8edf6;
  --text-dim: #92a0bd;
  --text-faint: #5c6a8a;

  --blue: #3b82f6;
  --blue-bright: #60a5fa;
  --blue-dim: #1d4ed8;
  --blue-glow: rgba(59, 130, 246, 0.35);

  --accent: #38bdf8;
  --success: #34d399;
  --success-dim: #0f3d30;
  --danger: #f87171;
  --danger-dim: #401f24;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --shadow-card: 0 1px 0 rgba(255,255,255,0.03) inset, 0 10px 30px -12px rgba(0,0,0,0.55);
  --shadow-pop: 0 20px 60px -20px rgba(0,0,0,0.7);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

/* Several rules below set `display` unconditionally on elements that are
   also toggled with the `hidden` attribute from JS (e.g. #login-screen,
   .loading-veil). An author rule with a plain `display` always beats the
   browser's built-in `[hidden] { display: none }` rule, no matter its
   specificity — so without this, `el.hidden = true` stops working the
   moment any selector below also sets `display` on that element. This
   forces `hidden` to always win. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--blue-glow); color: #fff; }

/* subtle animated medical grid backdrop */
.bg-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(59,130,246,0.14), transparent 60%),
    radial-gradient(700px 500px at 100% 10%, rgba(56,189,248,0.08), transparent 55%),
    linear-gradient(var(--bg), var(--bg));
}
.bg-field::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148,163,184,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(1200px 700px at 50% 0%, black, transparent 75%);
}

.screen { position: relative; z-index: 1; min-height: 100vh; }

button, input, textarea, select { font-family: inherit; }

svg { display: block; }

/* ===================== Brand ===================== */
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand-accent { color: var(--blue-bright); }
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(145deg, var(--blue), var(--blue-dim));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset, 0 4px 14px -4px var(--blue-glow);
}
.brand-mark svg { width: 15px; height: 15px; }
.brand-lg { font-size: 24px; gap: 12px; justify-content: center; }
.brand-lg .brand-mark { width: 38px; height: 38px; border-radius: 11px; }
.brand-lg .brand-mark svg { width: 20px; height: 20px; }

/* ===================== Login ===================== */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: linear-gradient(180deg, var(--bg-elev-2), var(--bg-elev-1));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px 32px;
  text-align: center;
  box-shadow: var(--shadow-pop);
  animation: rise 0.5s var(--ease) both;
}
.login-sub {
  margin: 14px 0 26px;
  color: var(--text-dim);
  font-size: 14px;
}
.login-hint {
  margin: 18px 0 0;
  color: var(--text-faint);
  font-size: 12px;
}
.field { position: relative; margin-bottom: 14px; }
#login-code {
  width: 100%;
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev-3);
  color: var(--text);
  font-size: 15px;
  letter-spacing: 0.04em;
  outline: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  text-align: center;
}
#login-code:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-glow);
}
#login-code::placeholder { color: var(--text-faint); letter-spacing: normal; }

.error-text {
  margin: 12px 0 0;
  color: var(--danger);
  font-size: 13px;
}
.error-text.shake-replay { animation: shake 0.4s var(--ease); }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), opacity 0.2s var(--ease);
  user-select: none;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(145deg, var(--blue-bright), var(--blue-dim));
  color: #fff;
  box-shadow: 0 6px 20px -8px var(--blue-glow), 0 0 0 1px rgba(255,255,255,0.06) inset;
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 10px 26px -8px var(--blue-glow), 0 0 0 1px rgba(255,255,255,0.1) inset;
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--bg-elev-3);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover:not(:disabled) { border-color: var(--blue); color: var(--blue-bright); }

.btn-accept {
  background: var(--success-dim);
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.35);
}
.btn-accept:hover:not(:disabled) { background: rgba(52,211,153,0.18); transform: translateY(-1px); }

.btn-decline {
  background: var(--danger-dim);
  color: var(--danger);
  border-color: rgba(248, 113, 113, 0.35);
}
.btn-decline:hover:not(:disabled) { background: rgba(248,113,113,0.18); transform: translateY(-1px); }

/* ===================== Topbar ===================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 28px;
  background: rgba(11, 15, 23, 0.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.tabs { display: flex; gap: 4px; background: var(--bg-elev-2); padding: 4px; border-radius: 999px; border: 1px solid var(--border-soft); }
.tab-btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  background: linear-gradient(145deg, var(--blue), var(--blue-dim));
  color: #fff;
  box-shadow: 0 4px 14px -6px var(--blue-glow);
}
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }

.model-select {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 6px 6px 14px;
}
.model-select-label { font-size: 12px; color: var(--text-faint); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.model-select select {
  background: var(--bg-elev-3);
  color: var(--text);
  border: none;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

/* ===================== Layout ===================== */
.content { max-width: 1180px; margin: 0 auto; padding: 28px 28px 60px; }
.tab-panel { display: none; animation: fadein 0.35s var(--ease) both; }
.tab-panel.active { display: block; }
@keyframes fadein {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.col-head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.col-title { font-size: 15px; font-weight: 700; margin: 0; color: var(--text); }
.count-pill {
  font-size: 11px;
  font-weight: 700;
  color: var(--blue-bright);
  background: rgba(59,130,246,0.14);
  border: 1px solid rgba(59,130,246,0.28);
  border-radius: 999px;
  padding: 2px 9px;
}

.panel-grid { display: grid; grid-template-columns: 320px 1fr; gap: 24px; align-items: start; }

/* ===================== Gallery ===================== */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
  max-height: 74vh;
  overflow-y: auto;
  padding-right: 4px;
}
.gallery::-webkit-scrollbar { width: 6px; }
.gallery::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.case-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-elev-2);
  border: 1px solid var(--border-soft);
  cursor: pointer;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
  animation: fadein 0.3s var(--ease) both;
}
.case-card:hover { transform: translateY(-3px); border-color: var(--blue); box-shadow: 0 10px 24px -14px var(--blue-glow); }
.case-card.selected { border-color: var(--blue-bright); box-shadow: 0 0 0 2px var(--blue-glow), 0 10px 24px -14px var(--blue-glow); }
.case-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; display: block; background: #000; }
.case-name {
  font-size: 11px;
  color: var(--text-dim);
  padding: 6px 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-top: 1px solid var(--border-soft);
}
.case-card.uploads::before {
  content: "uploaded";
  position: absolute;
  top: 6px;
  left: 6px;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--accent);
  background: rgba(56,189,248,0.16);
  border: 1px solid rgba(56,189,248,0.3);
  padding: 2px 6px;
  border-radius: 999px;
}

.history-empty { color: var(--text-faint); font-size: 13px; padding: 20px 4px; }

/* ===================== Detail panel ===================== */
.detail-col {
  background: linear-gradient(180deg, var(--bg-elev-1), var(--bg-elev-2));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 22px;
  min-height: 480px;
  box-shadow: var(--shadow-card);
}

.detail-empty {
  height: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--text-faint);
  font-size: 14px;
  text-align: center;
}
.empty-icon { color: var(--text-faint); opacity: 0.7; }
.empty-icon svg { width: 44px; height: 44px; }

.detail-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.detail-title { margin: 0; font-size: 16px; font-weight: 700; color: var(--text); word-break: break-all; }
.badge-source {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--text-dim);
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  white-space: nowrap;
}

.image-stage {
  position: relative;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-soft);
}
.stage-img { width: 100%; display: block; }
.stage-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 1;
  transition: opacity 0.45s var(--ease);
}
.stage-overlay.hidden-mask { opacity: 0; }

.loading-veil {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(10, 14, 22, 0.72);
  backdrop-filter: blur(3px);
  color: var(--text-dim);
  font-size: 13px;
  animation: fadein 0.2s var(--ease) both;
}
.spinner {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 3px solid rgba(59,130,246,0.2);
  border-top-color: var(--blue-bright);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-bar { width: 140px; height: 3px; border-radius: 3px; background: rgba(59,130,246,0.15); overflow: hidden; }
.loading-bar-fill {
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--blue), var(--accent));
  border-radius: 3px;
  animation: loadbar 1.1s ease-in-out infinite;
}
@keyframes loadbar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

.stage-actions { display: flex; align-items: center; gap: 18px; margin-top: 18px; flex-wrap: wrap; }

.mask-toggle { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim); cursor: pointer; user-select: none; }
.mask-toggle input { display: none; }
.toggle-track {
  width: 34px;
  height: 19px;
  border-radius: 999px;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  position: relative;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--text-faint);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}
.mask-toggle input:checked + .toggle-track { background: rgba(59,130,246,0.25); border-color: var(--blue); }
.mask-toggle input:checked + .toggle-track .toggle-thumb { transform: translateX(15px); background: var(--blue-bright); }

/* ===================== Review block ===================== */
.review-block {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border-soft);
  animation: fadein 0.3s var(--ease) both;
}
.review-prompt { margin: 0 0 12px; font-size: 13.5px; color: var(--text-dim); }
.review-actions { display: flex; gap: 10px; margin-bottom: 12px; }
#review-note {
  width: 100%;
  resize: vertical;
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 10px 12px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s var(--ease);
}
#review-note:focus { border-color: var(--blue); }
.saved-text {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 10px 0 0;
  color: var(--success);
  font-size: 13px;
  animation: fadein 0.3s var(--ease) both;
}

.history-block { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border-soft); }
.history-block h4 { margin: 0 0 10px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-faint); }
.history-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-height: 220px; overflow-y: auto; }
.history-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--text-dim);
  background: var(--bg-elev-3);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
.history-list li span:nth-child(2) { flex: 1; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-list .ts { color: var(--text-faint); font-size: 11px; white-space: nowrap; }
.badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge.accept { color: var(--success); background: rgba(52,211,153,0.14); border: 1px solid rgba(52,211,153,0.3); }
.badge.decline { color: var(--danger); background: rgba(248,113,113,0.14); border: 1px solid rgba(248,113,113,0.3); }

/* ===================== Upload tab ===================== */
.upload-card {
  max-width: 620px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--bg-elev-1), var(--bg-elev-2));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.upload-sub { color: var(--text-dim); font-size: 13.5px; margin: 4px 0 22px; }

.file-drop {
  display: block;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elev-3);
  padding: 30px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
  margin-bottom: 14px;
}
.file-drop:hover, .file-drop.dragover { border-color: var(--blue); background: rgba(59,130,246,0.06); }
.file-drop input { display: none; }
.file-drop-inner { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-dim); }
.file-drop-inner svg { color: var(--blue-bright); }
#file-drop-text { font-size: 13.5px; }

.upload-preview {
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  animation: fadein 0.3s var(--ease) both;
}
.upload-preview img { width: 100%; max-height: 260px; object-fit: contain; display: block; background: #000; }

.layout-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 20px; }
.layout-opt {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  padding: 16px 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-elev-3);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.15s var(--ease);
}
.layout-opt:hover { transform: translateY(-2px); }
.layout-opt input { position: absolute; opacity: 0; }
.layout-icon { color: var(--text-dim); transition: color 0.2s var(--ease); }
.layout-icon svg { width: 26px; height: 26px; }
.layout-name { font-size: 12.5px; font-weight: 600; color: var(--text); }
.layout-desc { font-size: 10.5px; color: var(--text-faint); }
.layout-opt:has(input:checked) {
  border-color: var(--blue);
  background: rgba(59,130,246,0.09);
  box-shadow: 0 0 0 1px var(--blue) inset;
}
.layout-opt:has(input:checked) .layout-icon { color: var(--blue-bright); }

.upload-result { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border-soft); animation: fadein 0.3s var(--ease) both; }
.upload-result-title { font-size: 12.5px; color: var(--text-dim); margin: 0 0 10px; }

/* ===================== Reviews tab ===================== */
.reviews-card {
  max-width: 780px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--bg-elev-1), var(--bg-elev-2));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.review-filters { margin-left: auto; display: flex; gap: 6px; }
.filter-btn {
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev-3);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.filter-btn:hover { color: var(--text); }
.filter-btn.active { background: linear-gradient(145deg, var(--blue), var(--blue-dim)); color: #fff; border-color: transparent; }
.history-list-lg { max-height: none; }
.history-list-lg li { font-size: 13px; padding: 11px 12px; }

/* ===================== Footer ===================== */
.footer {
  text-align: center;
  padding: 28px 20px 40px;
  color: var(--text-faint);
  font-size: 12px;
  border-top: 1px solid var(--border-soft);
  margin-top: 20px;
}

/* ===================== Toasts ===================== */
.toast-stack {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 240px;
  max-width: 340px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-elev-3);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  box-shadow: var(--shadow-pop);
  animation: toast-in 0.3s var(--ease) both;
}
.toast.error { border-color: rgba(248,113,113,0.4); }
.toast.success { border-color: rgba(52,211,153,0.4); }
.toast.leaving { animation: toast-out 0.25s var(--ease) both; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px) scale(0.96); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes toast-out { to { opacity: 0; transform: translateX(30px); } }

/* ===================== Responsive ===================== */
@media (max-width: 860px) {
  .panel-grid { grid-template-columns: 1fr; }
  .gallery { max-height: 300px; }
  .topbar { flex-wrap: wrap; gap: 12px; padding: 12px 16px; }
  .topbar-right { margin-left: 0; width: 100%; justify-content: space-between; }
  .content { padding: 20px 16px 50px; }
}