:root {
    /* Cipher — Amber + Gold */
    --bg:        #0B1220;
    --surface:   #111827;
    --surface-2: #0d1424;
    --primary:   #F59E0B;
    --secondary: #FBBF24;
    --accent:    #FCD34D;
    --text:      #F8FAFC;
    --muted:     #94A3B8;
    --danger:    #EF4444;
    --success:   #22C55E;

    /* derived */
    --line:      rgba(148,163,184,0.14);
    --line-2:    rgba(148,163,184,0.08);
    --cell-off:  rgba(148,163,184,0.06);
    --glow:      rgba(245,158,11,0.20);

    --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
    --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  a { color: inherit; text-decoration: none; }
  .mono { font-family: var(--font-mono); }
  .wrap { width: 100%; max-width: 880px; margin: 0 auto; padding: 0 24px; }

  /* ---------- NAV ---------- */
  nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(11,18,32,0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line-2);
  }
  .nav-inner {
    max-width: 1080px; margin: 0 auto; padding: 16px 24px;
    display: flex; align-items: center; gap: 24px;
  }
  .brand { display: flex; align-items: center; gap: 11px; }
  .brand .glyph {
    width: 28px; height: 28px; flex: none;
    display: grid; place-items: center;
    border: 1px solid var(--primary);
    border-radius: 7px;
    color: var(--primary);
    box-shadow: 0 0 16px -4px var(--glow), inset 0 0 12px -6px var(--glow);
  }
  .brand .glyph svg { width: 15px; height: 15px; display: block; }
  .brand .name {
    font-family: var(--font-display); font-weight: 700;
    font-size: 16px; letter-spacing: 0.06em; text-transform: uppercase;
  }
  .brand .tool {
    font-family: var(--font-mono); font-size: 11px;
    color: var(--accent); letter-spacing: 0.1em;
    border: 1px solid var(--line); border-radius: 999px;
    padding: 2px 8px; margin-left: 2px;
  }
  .nav-links { margin-left: auto; display: flex; align-items: center; gap: 4px; }
  .nav-links a {
    font-size: 13.5px; color: var(--muted); padding: 8px 13px;
    border-radius: 8px; transition: color .15s, background .15s;
  }
  .nav-links a:hover { color: var(--text); background: var(--line-2); }
  .nav-links a.cta {
    color: var(--bg); background: var(--primary); font-weight: 600;
  }
  .nav-links a.cta:hover { background: var(--secondary); color: var(--bg); }
  .nav-toggle { display: none; }

  /* ---------- HERO ---------- */
  .hero { position: relative; padding: 74px 0 30px; text-align: center; }
  .hero::before {
    content: ""; position: absolute; inset: -40% 0 auto 0; height: 460px;
    background: radial-gradient(620px 300px at 50% 0%, var(--glow), transparent 70%);
    pointer-events: none; z-index: 0;
  }
  .hero > * { position: relative; z-index: 1; }
  .eyebrow {
    font-family: var(--font-mono); font-size: 12px;
    letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--accent); margin: 0 0 20px;
  }
  .eyebrow .dot { color: var(--muted); margin: 0 8px; }
  h1.head {
    font-family: var(--font-display); font-weight: 700;
    font-size: clamp(34px, 6vw, 56px); line-height: 1.04;
    letter-spacing: -0.025em; margin: 0 0 18px;
  }
  h1.head .glow { color: var(--accent); }
  .hero .sub {
    color: var(--muted); font-size: clamp(15px, 2vw, 17px);
    max-width: 560px; margin: 0 auto;
  }
  .hero .sub strong { color: var(--text); font-weight: 600; }

  /* ---------- AUDITOR ---------- */
  section { position: relative; }
  .auditor { padding: 30px 0 20px; }

  .panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 26px;
  }
  .panel + .panel { margin-top: 18px; }

  .field { position: relative; }
  label.lbl {
    display: block; font-size: 12px; color: var(--muted);
    margin-bottom: 9px; font-family: var(--font-mono);
    letter-spacing: 0.04em; text-transform: uppercase;
  }
  input[type="text"], input[type="password"] {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--line);
    color: var(--text);
    border-radius: 11px;
    padding: 15px 84px 15px 16px;
    font-size: 16px;
    font-family: var(--font-mono);
    outline: none;
    transition: border-color .15s, box-shadow .15s;
  }
  input::placeholder { color: var(--muted); opacity: .65; }
  input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245,158,11,0.16);
  }
  .toggle {
    position: absolute; right: 9px; bottom: 9px;
    background: transparent; border: 1px solid var(--line);
    color: var(--muted); border-radius: 8px;
    padding: 7px 11px; font-size: 12px; cursor: pointer;
    font-family: var(--font-mono); transition: border-color .15s, color .15s;
  }
  .toggle:hover { border-color: var(--primary); color: var(--accent); }

  /* hero readout */
  .readout-top {
    display: flex; align-items: flex-end; gap: 14px;
    margin: 26px 0 4px; flex-wrap: wrap;
  }
  .bits {
    font-family: var(--font-mono); font-weight: 700;
    font-size: clamp(46px, 9vw, 64px); line-height: 0.9;
    letter-spacing: -0.03em; color: var(--text);
    transition: color .25s;
  }
  .bits-unit { font-size: 14px; color: var(--muted); padding-bottom: 7px; }
  .verdict {
    margin-left: auto; align-self: center;
    font-family: var(--font-mono);
    font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
    padding: 7px 14px; border-radius: 999px;
    border: 1px solid var(--line); color: var(--muted);
    transition: color .25s, border-color .25s;
  }

  /* signature: bit grid */
  .bitgrid-label {
    display: flex; justify-content: space-between; align-items: baseline;
    font-family: var(--font-mono); font-size: 11px; color: var(--muted);
    letter-spacing: 0.06em; margin: 18px 0 9px;
  }
  .bitgrid-label .count { color: var(--mono-dim, var(--muted)); }
  .bitgrid-label .count b { color: var(--accent); font-weight: 600; }
  .bitgrid {
    display: grid; grid-template-columns: repeat(32, 1fr); gap: 3px;
  }
  .cell {
    aspect-ratio: 1; border-radius: 2px;
    background: var(--cell-off);
    transition: background .28s ease, box-shadow .28s ease, transform .28s ease;
  }
  .cell.lit { background: var(--cell); }
  .cell.edge { box-shadow: 0 0 9px -1px var(--cell); transform: scale(1.06); }

  .readouts {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
    background: var(--line); border: 1px solid var(--line);
    border-radius: 12px; overflow: hidden; margin-top: 22px;
  }
  .ro { background: var(--surface); padding: 15px 17px; }
  .ro .k { font-size: 11.5px; color: var(--muted); margin-bottom: 5px; line-height: 1.4; }
  .ro .v { font-family: var(--font-mono); font-size: 15px; color: var(--text); word-break: break-word; }

  .checks { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
  .chk {
    font-size: 12px; padding: 6px 11px; border-radius: 999px;
    border: 1px solid var(--line); color: var(--muted);
    font-family: var(--font-mono); letter-spacing: 0.02em;
    transition: color .15s, border-color .15s;
  }
  .chk.on { color: var(--success); border-color: rgba(34,197,94,0.4); }

  /* breach */
  .breach-row { display: flex; gap: 12px; align-items: center; margin-top: 4px; flex-wrap: wrap; }
  .btn {
    background: var(--primary); color: var(--bg);
    border: 0; border-radius: 11px; padding: 13px 18px;
    font-weight: 600; font-size: 14px; cursor: pointer;
    font-family: var(--font-body); transition: background .15s, transform .05s;
  }
  .btn:hover { background: var(--secondary); }
  .btn:active { transform: translateY(1px); }
  .btn:disabled { opacity: 0.5; cursor: not-allowed; }
  .breach-out { font-family: var(--font-mono); font-size: 13.5px; }
  .breach-out.safe  { color: var(--success); }
  .breach-out.pwned { color: var(--danger); }
  .breach-out.muted { color: var(--muted); }

  .note {
    font-size: 12.5px; color: var(--muted); line-height: 1.6;
    border-left: 2px solid var(--primary); padding-left: 13px; margin-top: 18px;
  }
  .spinner {
    display: inline-block; width: 13px; height: 13px;
    border: 2px solid var(--muted); border-top-color: transparent;
    border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  /* ---------- HOW IT WORKS ---------- */
  .section-block { padding: 64px 0 20px; }
  .section-head { margin-bottom: 34px; }
  .section-head .kicker {
    font-family: var(--font-mono); font-size: 12px; color: var(--accent);
    letter-spacing: 0.2em; text-transform: uppercase; margin: 0 0 12px;
  }
  .section-head h2 {
    font-family: var(--font-display); font-weight: 600;
    font-size: clamp(26px, 4vw, 34px); letter-spacing: -0.02em; margin: 0;
  }
  .section-head p { color: var(--muted); margin: 12px 0 0; max-width: 560px; }

  .idea { display: grid; grid-template-columns: 64px 1fr; gap: 22px; padding: 28px 0; }
  .idea + .idea { border-top: 1px solid var(--line-2); }
  .idea .mark {
    font-family: var(--font-mono); font-size: 13px; font-weight: 600;
    color: var(--primary); letter-spacing: 0.08em;
    border: 1px solid var(--line); border-radius: 10px;
    height: 52px; display: grid; place-items: center;
    box-shadow: inset 0 0 18px -10px var(--glow);
  }
  .idea h3 { font-family: var(--font-display); font-size: 21px; font-weight: 600; margin: 4px 0 10px; letter-spacing: -0.01em; }
  .idea p { color: var(--muted); margin: 0 0 14px; font-size: 15px; }
  .idea p:last-child { margin-bottom: 0; }
  .idea strong { color: var(--text); font-weight: 600; }
  .formula {
    font-family: var(--font-mono); font-size: 14px; color: var(--accent);
    background: var(--surface); border: 1px solid var(--line);
    border-radius: 11px; padding: 16px 18px; margin: 6px 0 14px;
    overflow-x: auto;
  }
  .compare { display: flex; gap: 12px; flex-wrap: wrap; margin: 4px 0 0; }
  .pwbox { flex: 1; min-width: 200px; background: var(--surface); border: 1px solid var(--line); border-radius: 11px; padding: 14px 16px; }
  .pwbox .pwtag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 7px; }
  .pwbox.strong .pwtag { color: var(--success); }
  .pwbox.weak .pwtag { color: var(--danger); }
  .pwbox .pwval { font-family: var(--font-mono); font-size: 14px; color: var(--text); word-break: break-all; }
  .pwbox .pwbits { font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin-top: 7px; }
  .steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
  .steps li {
    position: relative; padding: 0 0 16px 38px; color: var(--muted); font-size: 15px;
  }
  .steps li:last-child { padding-bottom: 0; }
  .steps li::before {
    counter-increment: step; content: counter(step);
    position: absolute; left: 0; top: -1px;
    font-family: var(--font-mono); font-size: 12px; font-weight: 600;
    color: var(--accent); width: 24px; height: 24px;
    border: 1px solid var(--line); border-radius: 7px;
    display: grid; place-items: center;
  }
  .steps li strong { color: var(--text); }

  /* ---------- ABOUT ---------- */
  .about-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
  .about-card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 26px;     margin-bottom: 24px;
}
  .about-card h3 { font-family: var(--font-display); font-size: 19px; font-weight: 600; margin: 0 0 12px; }
  .about-card p { color: var(--muted); margin: 0 0 12px; font-size: 15px; }
  .about-card p:last-child { margin-bottom: 0; }
  .about-card strong { color: var(--text); }
  .suite-list { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
  .suite-item { display: flex; align-items: center; gap: 13px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface-2); }
  .suite-item .num { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
  .suite-item .nm { font-family: var(--font-display); font-weight: 600; font-size: 15px; }
  .suite-item .ds { font-size: 13px; color: var(--muted); margin-left: auto; }
  .suite-item.active { border-color: var(--primary); box-shadow: inset 0 0 24px -14px var(--glow); }
  .suite-item.active .nm { color: var(--accent); }

  /* ---------- FOOTER ---------- */
  footer { border-top: 1px solid var(--line-2); margin-top: 70px; padding: 44px 0 56px; }
  .foot-inner { max-width: 1080px; margin: 0 auto; padding: 0 24px; display: flex; gap: 30px; flex-wrap: wrap; align-items: flex-start; }
  .foot-brand { max-width: 320px; }
  .foot-brand p { color: var(--muted); font-size: 13px; margin: 12px 0 0; line-height: 1.6; }
  .foot-cols { display: flex; gap: 54px; margin-left: auto; flex-wrap: wrap; }
  .foot-col h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; }
  .foot-col a { display: block; color: var(--muted); font-size: 13.5px; padding: 4px 0; transition: color .15s; }
  .foot-col a:hover { color: var(--accent); }
  .foot-bottom { max-width: 1080px; margin: 36px auto 0; padding: 22px 24px 0; border-top: 1px solid var(--line-2); display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
  .foot-bottom span { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
  .foot-bottom .tag { color: var(--accent); }

  /* ---------- RESPONSIVE ---------- */
  @media (max-width: 720px) {
    .nav-links { display: none; }
    .nav-links.open { display: flex; position: absolute; top: 100%; left: 0; right: 0;
      flex-direction: column; align-items: stretch; gap: 2px; padding: 10px 16px 16px;
      background: rgba(11,18,32,0.97); border-bottom: 1px solid var(--line); }
    .nav-links.open a { padding: 12px; }
    .nav-toggle { display: grid; place-items: center; margin-left: auto;
      width: 38px; height: 38px; background: transparent; border: 1px solid var(--line);
      border-radius: 9px; color: var(--text); cursor: pointer; }
    .idea { grid-template-columns: 1fr; gap: 12px; }
    .idea .mark { width: 52px; }
  }
  @media (max-width: 560px) {
    .readouts { grid-template-columns: 1fr; }
    .bitgrid { grid-template-columns: repeat(16, 1fr); }
    .verdict { margin-left: 0; }
    .readout-top { gap: 10px; }
  }

  :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation-duration: .01ms !important; scroll-behavior: auto; }
  }