:root {
  --bg: #0b1020;
  --panel: #121827;
  --panel2: #172033;
  --panel3: #1d2940;
  --border: #2b3852;
  --text: #edf4ff;
  --muted: #9fb0c9;
  --accent: #7dd3fc;
  --accent2: #38bdf8;
  --ok: #86efac;
  --warn: #fde68a;
  --error: #fca5a5;
  --shadow: 0 20px 60px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #16223f 0%, var(--bg) 42%, #080b14 100%);
  color: var(--text);
}

button, input { font: inherit; }

.topbar {
  min-height: 86px;
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 15, 28, .86);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: linear-gradient(135deg, #1f2a44, #111827);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  font-size: 24px;
}

h1, h2, h3, p { margin: 0; }
h1 { font-size: 20px; letter-spacing: .2px; }
h2 { font-size: 16px; margin-bottom: 12px; }
h3 { font-size: 14px; }
p { color: var(--muted); margin-top: 4px; font-size: 13px; }

.actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.fileButton, .ghostButton, .viewerToolbar button, .controls button {
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.fileButton:hover, .ghostButton:hover, .viewerToolbar button:hover, .controls button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}
.fileButton.primary { background: linear-gradient(135deg, #075985, #0f172a); border-color: #0ea5e9; }
.fileButton input { display: none; }
button:disabled, .ghostButton:disabled { opacity: .45; cursor: not-allowed; transform: none; }

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(420px, 1fr) minmax(300px, 390px);
  gap: 16px;
  padding: 16px;
  height: calc(100vh - 87px);
}

.card, .viewerPanel {
  background: rgba(18, 24, 39, .88);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.card { padding: 16px; }
.card.compact { margin-top: 16px; }
.studyPanel, .sidePanel { min-height: 0; overflow: auto; }
.studyPanel .card, .sidePanel .card { min-height: min-content; }

.viewerPanel {
  display: grid;
  grid-template-rows: auto minmax(280px, 1fr) auto auto;
  min-height: 0;
  overflow: hidden;
}
.viewerToolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(23, 32, 51, .65);
}
.viewerToolbar button { padding: 8px 10px; }
#viewerHint { color: var(--muted); font-size: 13px; margin-left: auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.dropZone {
  position: relative;
  min-height: 320px;
  overflow: hidden;
  background:
    linear-gradient(45deg, rgba(255,255,255,.025) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,.025) 25%, transparent 25%),
    #050811;
  background-size: 28px 28px;
  border-bottom: 1px solid var(--border);
}
.dropZone.dragging { outline: 2px dashed var(--accent); outline-offset: -12px; }

#dicomCanvas {
  display: none;
  position: absolute;
  transform-origin: 0 0;
  image-rendering: auto;
  cursor: grab;
}
#dicomCanvas.draggingCanvas { cursor: grabbing; }
#pdfFrame {
  display: none;
  width: 100%;
  height: 100%;
  border: 0;
  background: white;
}
.emptyState {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  color: var(--muted);
  padding: 30px;
}
.emptyState strong { color: var(--text); font-size: 20px; }
.emptyState small { color: #6f819d; }

.thumbStrip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  min-height: 62px;
  background: rgba(10, 15, 28, .62);
}
.thumbButton {
  min-width: 96px;
  max-width: 160px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  border-radius: 12px;
  padding: 8px;
  text-align: left;
  cursor: pointer;
}
.thumbButton.active { border-color: var(--accent2); background: #12334a; }
.thumbButton small { display: block; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.thumbButton .badge { margin-bottom: 3px; }

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
}
.controls label {
  display: grid;
  grid-template-columns: 70px 1fr 56px;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}
.controls input[type="range"] { width: 100%; }
.controls span { color: var(--text); font-variant-numeric: tabular-nums; }

.summaryBox, .status, .diagnostics {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}
.status.ok { color: var(--ok); border-color: rgba(134,239,172,.35); }
.status.warn { color: var(--warn); border-color: rgba(253,230,138,.35); }
.status.error { color: var(--error); border-color: rgba(252,165,165,.45); }

.studyTree { margin-top: 12px; display: grid; gap: 12px; }
.patientBlock, .studyBlock, .seriesBlock {
  border: 1px solid var(--border);
  background: rgba(23, 32, 51, .72);
  border-radius: 14px;
  overflow: hidden;
}
.patientHeader, .studyHeader, .seriesHeader {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.patientHeader { background: rgba(59,130,246,.10); }
.studyHeader { background: rgba(56,189,248,.08); }
.seriesHeader { background: rgba(15,23,42,.52); }
.patientHeader small, .studyHeader small, .seriesHeader small {
  color: var(--muted);
  display: block;
  margin-top: 4px;
  line-height: 1.35;
}
.instanceList { display: grid; gap: 6px; padding: 10px; }
.instanceButton, .reportButton {
  border: 1px solid transparent;
  background: rgba(15, 23, 42, .72);
  color: var(--text);
  border-radius: 12px;
  padding: 9px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  align-items: start;
  text-align: left;
  cursor: pointer;
}
.instanceButton:hover, .reportButton:hover { border-color: var(--accent); }
.instanceButton.active, .reportButton.active { border-color: var(--accent2); background: #12334a; }
.badge {
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--border);
  color: var(--accent);
  background: #07111d;
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.instanceButton span:last-child, .reportButton span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #dbeafe;
}
.reportButton .badge { color: var(--warn); }

#metadataTable {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 13px;
}
#metadataTable td {
  border-bottom: 1px solid rgba(43,56,82,.55);
  padding: 8px 6px;
  vertical-align: top;
  word-break: break-word;
}
#metadataTable td:first-child { color: var(--muted); width: 38%; }
#metadataTable td:last-child { color: var(--text); }

details { margin-top: 14px; }
summary { cursor: pointer; color: var(--accent); }
pre {
  max-height: 290px;
  overflow: auto;
  padding: 12px;
  background: #07111d;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: #c7d2fe;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

.diagGrid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.diagItem {
  background: rgba(15,23,42,.68);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
}
.diagItem strong { display: block; font-size: 18px; color: var(--text); }
.diagItem span { color: var(--muted); font-size: 12px; }
.errorList { margin-top: 10px; color: var(--error); font-size: 12px; }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 320px 1fr; height: auto; min-height: calc(100vh - 87px); }
  .sidePanel { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .topbar { align-items: stretch; flex-direction: column; }
  .actions { justify-content: flex-start; }
  .layout { grid-template-columns: 1fr; padding: 10px; }
  .controls { grid-template-columns: 1fr; }
  .controls label { grid-template-columns: 70px 1fr 48px; }
}