:root {
  color-scheme: light;
  --bg: #f4f1ec;
  --ink: #151515;
  --muted: #66615b;
  --line: #d9d1c5;
  --panel: #fffaf2;
  --dark: #202323;
  --blue: #246bfe;
  --green: #1f8a5b;
  --amber: #b56a1d;
  --red: #bd3b32;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.shell {
  min-height: 100vh;
  padding: 28px;
}

.workspace {
  max-width: 1180px;
  margin: 0 auto;
}

[hidden] { display: none !important; }

.brand-row, .section-heading, .result-panel {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.brand-row { position: relative; }

.eyebrow {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 64px; line-height: .98; letter-spacing: 0; }
h2 { margin-bottom: 8px; font-size: 24px; letter-spacing: 0; }
p { color: var(--muted); line-height: 1.55; }
.brand-lead { max-width: 620px; margin: 16px 0 0; font-size: 18px; }

.author, .language-switch {
  padding-bottom: 12px;
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
}

.language-switch {
  position: absolute;
  top: 0;
  right: 0;
  padding-bottom: 0;
  color: var(--ink);
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.author:hover, .language-switch:hover, .site-footer a:hover { color: var(--blue); }
.workflow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.workflow-step {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}
.workflow-step span {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
}
.workflow-step.active { color: var(--ink); }
.workflow-step.active span { border-color: var(--blue); background: var(--blue); color: white; }
.workflow-step.complete span { border-color: var(--green); background: var(--green); color: white; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 0;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.upload-zone {
  position: relative;
  min-height: 360px;
  margin-top: 32px;
  border: 1px solid var(--line);
  background: var(--dark);
  color: white;
  overflow: hidden;
}

.upload-zone.dragging { outline: 3px solid var(--blue); }
#meterCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.upload-copy {
  position: relative;
  max-width: 560px;
  padding: 44px;
}
.upload-copy h2 { font-size: 42px; line-height: 1; }
.upload-copy p { color: #d8d3cb; }

.file-button, .action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  background: var(--panel);
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}
.file-button input { display: none; }

.status-panel {
  margin-top: 16px;
  padding: 16px 0;
}
.status-line { margin-bottom: 8px; color: var(--muted); font-weight: 700; }
progress { width: 100%; height: 14px; accent-color: var(--green); }

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0 36px;
}
.metric {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 18px;
}
.metric span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.metric strong { display: block; margin-top: 8px; font-size: 30px; }

.preset-section { margin-top: 28px; }
.preset-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.preset-card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 18px;
  text-align: left;
  cursor: pointer;
}
.preset-card:hover, .preset-card.active { border-color: var(--blue); box-shadow: inset 0 0 0 1px var(--blue); }
.preset-card:disabled {
  cursor: not-allowed;
  opacity: .68;
}
.preset-card:disabled:hover { border-color: var(--line); box-shadow: none; }
.preset-card h3 { margin: 0 0 12px; color: var(--ink); font-size: 20px; font-weight: 850; }
.preset-card .target { color: var(--ink); font-weight: 900; }
.preset-card p { margin-bottom: 0; font-size: 14px; }

.result-panel {
  align-items: stretch;
  margin-top: 28px;
  border: 1px solid var(--line);
  background: #e7f0eb;
  padding: 22px;
}
.compact { margin: 0; flex: 1; }
.actions { display: flex; gap: 10px; align-items: center; }
.action.primary { background: var(--blue); color: white; border-color: var(--blue); }

@media (max-width: 800px) {
  .shell { padding: 18px; }
  .brand-row, .section-heading, .result-panel { display: block; }
  .brand-row { position: relative; padding-top: 36px; }
  .language-switch { position: absolute; top: 0; right: 0; margin: 0; }
  .author { display: block; margin-top: 18px; padding-bottom: 0; }
  .upload-copy { padding: 28px; }
  .brand-lead { font-size: 16px; }
  h1 { font-size: 42px; }
  .upload-copy h2 { font-size: 32px; }
  .analysis-grid, .preset-grid, .workflow { grid-template-columns: 1fr; }
  .actions { display: grid; margin-top: 16px; }
  .site-footer { display: block; }
  .site-footer span { display: block; margin-top: 4px; }
}

@media (max-width: 440px) {
  h1 { font-size: 36px; }
}