:root {
  color-scheme: light;
  --ink: #14213d;
  --muted: #667085;
  --line: #dbe4f0;
  --blue: #2563eb;
  --blue-dark: #1746a2;
  --surface: rgba(255, 255, 255, 0.92);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 4%, rgba(37, 99, 235, 0.16), transparent 32rem),
    linear-gradient(145deg, #f7faff 0%, #eef4fc 100%);
}

.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 52px 0 72px; }
header { margin-bottom: 28px; }
.eyebrow { margin: 0 0 8px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: 0.16em; }
h1 { margin: 0; font-size: clamp(32px, 5vw, 52px); letter-spacing: -0.04em; }
.subtitle { margin: 12px 0 0; color: var(--muted); font-size: 17px; }
.card { background: var(--surface); border: 1px solid rgba(219, 228, 240, 0.9); border-radius: 20px; box-shadow: 0 20px 55px rgba(28, 57, 103, 0.09); }
.upload-card { display: grid; grid-template-columns: 1fr auto; gap: 16px; padding: 20px; align-items: center; }
.drop-zone { min-height: 112px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border: 1.5px dashed #9db4d4; border-radius: 14px; cursor: pointer; transition: 160ms ease; }
.drop-zone:hover, .drop-zone.dragging { border-color: var(--blue); background: #f3f7ff; transform: translateY(-1px); }
.drop-zone span:last-child { color: var(--muted); font-size: 13px; }
.upload-icon { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; color: white; background: var(--blue); font-size: 20px; }
#file-input { position: absolute; width: 1px; height: 1px; opacity: 0; }
#parse-button { min-width: 132px; padding: 13px 21px; border: 0; border-radius: 12px; color: white; background: linear-gradient(135deg, var(--blue), var(--blue-dark)); font-weight: 750; font-size: 15px; cursor: pointer; box-shadow: 0 10px 22px rgba(37, 99, 235, 0.24); }
#parse-button:disabled { opacity: 0.58; cursor: wait; }
.status { grid-column: 1 / -1; margin: 0 4px; color: var(--muted); font-size: 14px; }
.status.success { color: #047857; }
.status.error { color: #b42318; }
.status.loading { color: var(--blue); }
.results-card { margin-top: 20px; overflow: hidden; }
.tabs { display: flex; gap: 4px; padding: 10px 12px 0; border-bottom: 1px solid var(--line); }
.tab { padding: 11px 17px; border: 0; border-bottom: 2px solid transparent; color: var(--muted); background: transparent; font-weight: 700; cursor: pointer; }
.tab.active { color: var(--blue); border-bottom-color: var(--blue); }
.panel { display: none; min-height: 420px; max-height: 72vh; overflow: auto; padding: 28px; }
.panel.active { display: block; }
.placeholder { color: var(--muted); }
.markdown-body { line-height: 1.72; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  margin: 1.35em 0 0.55em;
  color: #102044;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.markdown-body h1 { padding-bottom: 0.35em; border-bottom: 1px solid var(--line); font-size: 2em; }
.markdown-body h2 { padding-bottom: 0.3em; border-bottom: 1px solid var(--line); font-size: 1.55em; }
.markdown-body h3 { font-size: 1.25em; }
.markdown-body p { margin: 0.8em 0; }
.markdown-body ul, .markdown-body ol { padding-left: 1.6em; }
.markdown-body li { margin: 0.32em 0; }
.markdown-body blockquote { margin: 1em 0; padding: 0.2em 1em; color: #475467; border-left: 4px solid #93b4e8; background: #f7faff; }
.markdown-body a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 2px; }
.markdown-body hr { margin: 2em 0; border: 0; border-top: 1px solid var(--line); }
.markdown-body img { max-width: 100%; height: auto; border-radius: 8px; }
.markdown-body mjx-container[display="true"] { max-width: 100%; overflow-x: auto; overflow-y: hidden; padding: 0.35em 0; }
.markdown-body mjx-container { font-size: 1.04em; }
.markdown-body table { display: block; max-width: 100%; overflow: auto; border-collapse: collapse; }
.markdown-body th, .markdown-body td { padding: 8px 10px; border: 1px solid var(--line); }
.markdown-body pre, #result-json { white-space: pre-wrap; overflow-wrap: anywhere; font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; }
.markdown-body code { padding: 0.12em 0.35em; border-radius: 5px; background: #eef2f7; }
#result-json { margin: 0; }

@media (max-width: 700px) {
  .shell { width: min(100% - 20px, 1180px); padding-top: 28px; }
  .upload-card { grid-template-columns: 1fr; }
  #parse-button { width: 100%; }
  .panel { padding: 18px; min-height: 360px; }
}