:root {
  --ink: #e9f5ff;
  --muted: #9bb1c3;
  --bg: #07131f;
  --panel: #0d2030;
  --line: #294354;
  --cyan: #4ce4d1;
  --yellow: #ffd166;
  --shadow: rgba(0, 0, 0, .32);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); font: 16px/1.6 "Segoe UI", system-ui, sans-serif; }
a { color: inherit; }
code { font-family: Consolas, "SFMono-Regular", monospace; }
.topbar, main, footer { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.topbar { min-height: 76px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.topbar nav { display: flex; gap: 20px; margin-left: auto; margin-right: 26px; }
.topbar nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.topbar nav a:hover, .topbar nav a:focus-visible { color: var(--cyan); }
.brand { display: inline-flex; gap: 12px; align-items: center; text-decoration: none; font-weight: 800; letter-spacing: .08em; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--cyan); color: var(--cyan); font: 800 20px/1 Consolas, monospace; transform: rotate(-3deg); }
.version { color: var(--muted); font: 14px Consolas, monospace; }
.hero { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: 48px; padding: 88px 0 72px; align-items: center; }
.eyebrow { color: var(--cyan); font: 700 13px/1.2 Consolas, monospace; letter-spacing: .15em; margin: 0 0 14px; }
h1 { max-width: 780px; font-size: clamp(2.65rem, 6vw, 5.4rem); line-height: .98; letter-spacing: -.055em; margin: 0; text-wrap: balance; }
.lead { max-width: 680px; color: var(--muted); font-size: 1.2rem; margin: 28px 0; }
.actions { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.download { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 0 24px; background: var(--cyan); color: #031b1a; text-decoration: none; font-weight: 800; border: 1px solid var(--cyan); box-shadow: 7px 7px 0 #123a40; }
.download:hover, .download:focus-visible { background: #7ff4e5; transform: translate(-2px, -2px); box-shadow: 9px 9px 0 #123a40; }
.package-meta { color: var(--muted); font: 14px Consolas, monospace; }
.hash-card { margin-top: 28px; display: flex; gap: 16px; align-items: center; justify-content: space-between; padding: 14px 16px; border: 1px solid var(--line); background: #091925; max-width: 760px; }
.hash-card div { min-width: 0; }
.hash-card span { display: block; color: var(--yellow); font: 12px Consolas, monospace; margin-bottom: 5px; }
.hash-card code { display: block; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.hash-card button { flex: 0 0 auto; border: 1px solid var(--line); color: var(--ink); background: transparent; min-height: 40px; padding: 0 14px; cursor: pointer; font: 14px inherit; }
.hash-card button:hover, .hash-card button:focus-visible { border-color: var(--cyan); color: var(--cyan); }
.signal-panel { padding: 28px; border: 1px solid var(--line); background: linear-gradient(145deg, #0d2030, #091924); box-shadow: 20px 20px 0 var(--shadow); }
.signal-head { display: flex; align-items: center; gap: 10px; color: var(--cyan); font: 700 13px Consolas, monospace; letter-spacing: .12em; }
.pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 16px var(--cyan); }
.signal-panel dl { margin: 25px 0; }
.signal-panel dl div { display: grid; grid-template-columns: 72px 1fr; border-top: 1px solid var(--line); padding: 12px 0; }
.signal-panel dt { color: var(--yellow); font: 700 14px Consolas, monospace; }
.signal-panel dd { margin: 0; color: var(--muted); }
.signal-panel > p { color: var(--muted); font-size: 14px; margin: 0; }
section:not(.hero) { border-top: 1px solid var(--line); padding: 72px 0; }
.section-heading { display: grid; grid-template-columns: 180px 1fr; align-items: end; margin-bottom: 34px; }
h2 { font-size: clamp(1.8rem, 4vw, 3.1rem); line-height: 1.08; letter-spacing: -.035em; margin: 0; }
.steps ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.steps li { display: flex; gap: 18px; background: var(--panel); padding: 28px; }
.steps li > span { color: var(--cyan); font: 700 14px Consolas, monospace; }
h3 { margin: 0 0 8px; font-size: 1.08rem; }
.steps p, .detail-grid p { color: var(--muted); margin: 0; }
.detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.detail-grid article { min-height: 170px; padding: 28px; border: 1px solid var(--line); background: var(--panel); }
.detail-grid article::before { content: ""; display: block; width: 38px; height: 3px; background: var(--yellow); margin-bottom: 28px; }
.privacy-note { color: var(--muted); font-size: 13px; }
.reader-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 18px; }
.drop-card, .empty-result, .report-result { border: 1px solid var(--line); background: var(--panel); }
.drop-card { padding: 28px; }
.file-label { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 20px; color: #031b1a; background: var(--cyan); font-weight: 800; cursor: pointer; }
.file-label:hover, .file-label:focus-within { background: #7ff4e5; }
#report-file, #upload-file { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.drop-card p { color: var(--muted); margin: 18px 0 0; }
.reader-error { color: #ff9d9d !important; border-left: 3px solid #ff6b6b; padding-left: 12px; }
.empty-result { min-height: 190px; display: flex; flex-direction: column; justify-content: center; gap: 8px; padding: 30px; color: var(--muted); }
.empty-result strong { color: var(--ink); font-size: 1.25rem; }
.report-result { margin-top: 18px; padding: 28px; }
.verdict { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: center; padding: 18px; border: 1px solid var(--line); }
.verdict::before { content: ""; width: 14px; height: 14px; border-radius: 50%; background: var(--yellow); }
.verdict[data-level="good"]::before { background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
.verdict[data-level="danger"]::before { background: #ff6b6b; box-shadow: 0 0 14px #ff6b6b; }
.verdict strong, .verdict span { display: block; }
.verdict span { color: var(--muted); font-size: 14px; }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 18px; background: var(--line); border: 1px solid var(--line); }
.summary-grid article { background: #091925; padding: 18px; min-width: 0; }
.summary-grid span { display: block; color: var(--cyan); font: 12px Consolas, monospace; margin-bottom: 7px; }
.summary-grid strong { display: block; overflow-wrap: anywhere; }
.summary-grid small { color: var(--muted); }
.report-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.report-columns > article, .screening-card { padding: 22px; border: 1px solid var(--line); background: #091925; }
.result-row { display: flex; justify-content: space-between; gap: 14px; padding: 10px 0; border-top: 1px solid var(--line); color: var(--muted); }
.result-row b { color: var(--ink); text-align: right; }
.status-pass { color: var(--cyan) !important; }
.status-fail { color: #ff8b8b !important; }
.status-unknown { color: var(--yellow) !important; }
.screening-card { margin-top: 18px; }
.screening-card p { color: var(--muted); margin-bottom: 0; }
.report-result details { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 16px; }
.report-result summary { cursor: pointer; color: var(--yellow); }
.report-result li { color: var(--muted); margin-top: 8px; }
.upload-card { border: 1px solid var(--line); background: var(--panel); padding: 28px; display: grid; gap: 18px; max-width: 820px; }
.upload-card > label:not(.file-label) { display: grid; gap: 7px; color: var(--muted); }
.upload-card input[type="text"], .upload-card input:not([type]) { min-height: 48px; border: 1px solid var(--line); background: #091925; color: var(--ink); padding: 0 14px; font: 16px Consolas, monospace; text-transform: uppercase; }
.upload-card .consent { display: grid !important; grid-template-columns: auto 1fr; align-items: start; }
.upload-card .consent input { margin-top: 5px; }
#upload-button { min-height: 48px; border: 1px solid var(--cyan); color: #031b1a; background: var(--cyan); padding: 0 20px; font-weight: 800; cursor: pointer; justify-self: start; }
#upload-button:disabled { opacity: .55; cursor: wait; }
#upload-status { min-height: 24px; margin: 0; color: var(--yellow); }
.limits { display: grid; grid-template-columns: .75fr 1.25fr; gap: 50px; }
.limits ul { margin: 0; padding-left: 22px; color: var(--muted); }
.limits li { margin-bottom: 14px; }
footer { min-height: 92px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); color: var(--muted); font: 14px Consolas, monospace; }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 58px; }
  .steps ol { grid-template-columns: 1fr; }
  .section-heading, .limits { grid-template-columns: 1fr; gap: 16px; }
  .reader-grid, .report-columns { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .topbar, main, footer { width: min(100% - 24px, 1180px); }
  .version { display: none; }
  .topbar nav { margin: 0; }
  .hero { padding: 46px 0 52px; gap: 30px; }
  h1 { font-size: clamp(2.4rem, 13vw, 4rem); }
  .hash-card { align-items: stretch; flex-direction: column; }
  .detail-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; justify-content: center; align-items: flex-start; gap: 6px; }
}