:root {
  --bg: #0b1220;
  --panel: #0f1626;
  --border: #24344d;
  --text: #e8eef5;
  --muted: #8ca0b8;
  --teal: #4fd1c5;
  --orange: #ffb020;
  --orange-text: #1a1206;
  --critical: #f85149;
  --high: #ff9a3c;
  --medium: #d4a72c;
  --low: #58a6ff;
  --info: #8ca0b8;
  --font-heading: "Space Grotesk", "Noto Sans Thai", sans-serif;
  --font-body: "Inter", "Noto Sans Thai", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  font-size: 16px;
}

a { color: inherit; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 18, 32, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 900px; margin: 0 auto; padding: .9rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
}
.brand {
  display: flex; align-items: center; gap: .6rem; text-decoration: none;
  font-family: var(--font-heading); font-weight: 600; font-size: 1.05rem; color: var(--text);
}
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--panel);
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: .75rem; color: var(--teal);
}
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { text-decoration: none; color: var(--muted); font-size: .9rem; }
.nav-links a:hover { color: var(--text); }

/* hero */
main { max-width: 820px; margin: 0 auto; padding: 0 1.5rem 3rem; }
.hero { padding: 3.5rem 0 2rem; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-mono); font-size: .75rem; letter-spacing: .09em;
  color: var(--teal); margin-bottom: 1.1rem;
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--teal);
  box-shadow: 0 0 0 4px rgba(79, 209, 197, .18);
  flex-shrink: 0;
}
h1 {
  font-family: var(--font-heading); font-weight: 600; font-size: 2.6rem;
  line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 1.1rem;
}
.lede { color: var(--muted); font-size: 1.02rem; max-width: 640px; margin: 0; }

/* card / form */
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 1.75rem; margin-top: 1.5rem;
}
#scan-form { display: flex; flex-direction: column; gap: 1.1rem; }
.field label {
  display: block; font-size: .82rem; color: var(--muted); margin-bottom: .5rem;
  font-family: var(--font-mono); letter-spacing: .02em;
}
.field input[type=text] {
  width: 100%; padding: .75rem .9rem; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 1rem; font-family: var(--font-body);
}
.field input[type=text]:focus { outline: 2px solid var(--teal); outline-offset: 1px; }
.field input[type=text]::placeholder { color: var(--muted); }

.checkbox { display: flex; align-items: flex-start; gap: .6rem; cursor: pointer; font-size: .9rem; color: var(--muted); }
.checkbox input { margin-top: .25rem; flex-shrink: 0; accent-color: var(--teal); }

.btn-primary {
  align-self: flex-start; padding: .8rem 1.4rem; border: none; border-radius: 8px;
  background: var(--orange); color: var(--orange-text); font-weight: 600; font-size: .92rem;
  font-family: var(--font-body); cursor: pointer; transition: filter .15s;
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }
.btn-primary:disabled { background: var(--border); color: var(--muted); cursor: not-allowed; }
.error { color: var(--critical); font-size: .88rem; margin: 0; }

/* status */
.status-row { display: flex; align-items: center; gap: .75rem; padding: 1.75rem 0 0; }
.spinner {
  width: 20px; height: 20px; border: 3px solid var(--border); border-top-color: var(--teal);
  border-radius: 50%; animation: spin .8s linear infinite; flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* results */
.result-header { display: flex; gap: 1.25rem; align-items: center; margin: 2rem 0 1.25rem; flex-wrap: wrap; }
.grade-badge {
  width: 76px; height: 76px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading); font-size: 2.2rem; font-weight: 700; color: #04120e; flex-shrink: 0;
}
.result-header h2 { margin: 0; font-size: 1.1rem; font-family: var(--font-heading); word-break: break-all; }
.meta { color: var(--muted); font-size: .85rem; font-family: var(--font-mono); margin: .3rem 0; }
.downloads a { margin-right: 1rem; font-size: .82rem; color: var(--teal); text-decoration: none; font-family: var(--font-mono); }
.downloads a:hover { text-decoration: underline; }

.stat-row {
  display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border);
  border-radius: 10px; overflow: hidden; margin-bottom: 1.75rem;
}
.stat-cell {
  padding: 1.1rem 1.2rem; border-right: 1px solid var(--border); background: var(--panel);
}
.stat-cell:last-child { border-right: none; }
.stat-value { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 500; color: var(--teal); }
.stat-label { font-family: var(--font-mono); font-size: .72rem; color: var(--muted); letter-spacing: .06em; margin-top: .3rem; }

table { width: 100%; border-collapse: collapse; margin-bottom: 1.75rem; }
th, td { text-align: left; padding: .65rem .7rem; border-bottom: 1px solid var(--border); font-size: .87rem; }
th { color: var(--muted); font-weight: 500; font-family: var(--font-mono); font-size: .75rem; letter-spacing: .04em; }
.pill {
  display: inline-block; padding: .15rem .55rem; border-radius: 999px; font-size: .75rem;
  font-weight: 600; font-family: var(--font-mono);
}

.category-block {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 1.2rem 1.4rem; margin-bottom: .9rem;
}
.category-block h3 { margin: 0 0 .3rem; font-size: 1rem; font-family: var(--font-heading); font-weight: 600; }
.note { color: var(--muted); font-size: .83rem; font-style: italic; margin: .4rem 0; }
.finding { border-top: 1px solid var(--border); padding: .85rem 0; }
.finding:first-of-type { border-top: none; }
.finding-title { font-weight: 600; }
.sev-label { font-weight: 400; color: var(--muted); font-size: .82rem; font-family: var(--font-mono); }
.sev { display: inline-block; width: .55rem; height: .55rem; border-radius: 50%; margin-right: .45rem; }
.sev-critical { background: var(--critical); }
.sev-high { background: var(--high); }
.sev-medium { background: var(--medium); }
.sev-low { background: var(--low); }
.sev-info { background: var(--info); }
.finding p { margin: .3rem 0; font-size: .9rem; }
code {
  background: rgba(79, 209, 197, .1); color: var(--teal); padding: .1rem .4rem; border-radius: 4px;
  font-size: .85em; font-family: var(--font-mono);
}

footer {
  text-align: center; color: var(--muted); font-size: .8rem; padding: 2.5rem 1.5rem;
  max-width: 820px; margin: 0 auto; border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  h1 { font-size: 1.9rem; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .stat-cell:nth-child(2) { border-right: none; }
}