:root {
  --bg: #f9fafb;
  --surface: #ffffff;
  --surface-2: #f3f4f6;
  --border: #d7dbe0;
  --text: #111827;
  --muted: #5b6472;
  --primary: #0f766e;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

html {
  width: 100%;
  height: 100%;
  overflow: hidden !important;
}

body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden !important;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 14px;
}

button,
input,
select {
  font: inherit;
}

button {
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 0 14px;
  cursor: pointer;
}

button[type="submit"] {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.app {
  position: fixed;
  inset: 0;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden !important;
}

.toolbar {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: minmax(260px, 400px) minmax(320px, 1fr) minmax(280px, 420px);
  gap: 24px;
  align-items: end;
  padding: 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.title h1,
.panel h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
  font-weight: 650;
}

.title p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.45;
  max-width: 620px;
}

.form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}

.input-row {
  display: flex;
  gap: 8px;
}

.input-row input {
  width: 100%;
  min-width: 0;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
}

.input-row input[type="file"] {
  padding: 7px 10px;
}

.input-row input:focus {
  outline: 2px solid color-mix(in srgb, var(--primary) 28%, transparent);
  border-color: var(--primary);
}

.workspace {
  min-height: 0;
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr;
  overflow: hidden !important;
}

.panel {
  height: 100%;
  min-height: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.panel-section {
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 18px;
}

.stats {
  margin: 14px 0 0;
}

.stats div {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--surface-2);
}

.stats dt {
  color: var(--muted);
}

.stats dd {
  margin: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.field {
  display: block;
  margin-top: 12px;
  margin-bottom: 8px;
  color: var(--muted);
}

select {
  width: 100%;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 0 10px;
}

.disclaimer {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.viewer-wrap {
  position: relative;
  min-width: 0;
  width: 100%;
  min-height: 0;
  height: 100%;
  overflow: hidden !important;
  background: #eef0f2;
  contain: size layout paint;
}

#viewer {
  position: absolute;
  inset: 0;
  overflow: hidden !important;
  touch-action: none;
}

#viewer canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.viewer-wrap.is-loading #viewer {
  visibility: hidden;
}

.message {
  position: absolute;
  left: 16px;
  bottom: 16px;
  max-width: min(520px, calc(100% - 32px));
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--muted);
  line-height: 1.35;
}

.message.error {
  color: var(--danger);
}

.message.loading {
  display: flex;
  align-items: center;
  gap: 8px;
}

.message.loading::before {
  content: "";
  width: 13px;
  height: 13px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: loading-spin 0.8s linear infinite;
  flex: 0 0 auto;
}

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

@media (max-width: 860px) {
  .toolbar,
  .workspace {
    grid-template-columns: 1fr;
  }

  .workspace {
    grid-template-rows: minmax(180px, 36%) minmax(280px, 1fr);
  }

  .panel {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .viewer-wrap {
    min-height: 0;
  }
}