/* ============================================================
   MKS VisionOne Fire — Design System v3
   Direction: Light editorial enterprise (Verkada-style).
   Warm off-white surfaces, hairline borders, restrained
   vermilion accent. Dark panels reserved for product UI
   (CCTV monitor, consoles, data visuals) as contrast blocks.
   ============================================================ */

:root{
  /* light surfaces */
  --bg:        #fafaf7;
  --bg-2:      #f3f2ee;
  --panel:     #ffffff;
  --line:      #e6e4de;
  --line-soft: #eeece6;

  /* text */
  --ink:       #191c22;
  --mut:       #565d6b;
  --dim:       #7e8593;

  /* accents */
  --fire:      #e03e22;   /* vermilion — buttons, marks */
  --fire-deep: #c53318;   /* text-safe vermilion */
  --fire-soft: #fdeeea;
  --safe:      #2456c4;   /* deep blue — "정상" */
  --safe-soft: #edf2fc;
  --ok:        #147a46;   /* deep green — 충족 */
  --ok-soft:   #eaf5ef;
  --amber:     #9a6b00;

  /* dark product-UI panels */
  --dk:        #101319;
  --dk-2:      #151a22;
  --dk-line:   rgba(148,163,184,.16);
  --dk-ink:    #e8ecf3;
  --dk-mut:    #97a2b3;
  --dk-dim:    #66707f;

  --paper:     #f7f4ec;
  --paper-ink: #23262c;
  --paper-mut: #8a8578;

  --sans: "Wanted Sans Variable", "Wanted Sans", "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;

  --shadow-card: 0 1px 2px rgba(25,28,34,.04), 0 8px 24px -12px rgba(25,28,34,.08);
  --shadow-deep: 0 24px 60px -24px rgba(25,28,34,.35);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.65;
  letter-spacing:-.005em;
  word-break:keep-all;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:rgba(224,62,34,.16)}
img{max-width:100%}
a{color:inherit;text-decoration:none}
section[id],[id]{scroll-margin-top:84px}
a:focus-visible,.btn:focus-visible,video:focus-visible{
  outline:2px solid var(--safe);outline-offset:3px;border-radius:4px;
}

.wrap{max-width:1180px;margin:0 auto;padding:0 28px}

/* ---------- typography ---------- */
.eyebrow{
  display:flex;align-items:center;gap:14px;
  font-family:var(--mono);font-size:12px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--fire-deep);
  margin-bottom:22px;
}
.eyebrow::after{content:"";flex:0 0 48px;height:1px;background:var(--fire)}
.eyebrow .n{color:var(--dim)}
h1,h2,h3{font-weight:800;letter-spacing:-.028em;line-height:1.2;color:var(--ink)}
h2.d{font-size:clamp(30px,4vw,44px);margin-bottom:22px}
h2.d em{font-style:normal;color:var(--fire-deep)}
h2.d .safe{color:var(--safe)}
.lede{font-size:clamp(16px,1.4vw,18px);line-height:1.75;color:var(--mut);max-width:620px;font-weight:400}
.mono{font-family:var(--mono)}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s;
}
.nav.scrolled{background:rgba(250,250,247,.88);backdrop-filter:blur(14px);border-color:var(--line)}
.nav-in{max-width:1180px;margin:0 auto;padding:0 28px;height:68px;display:flex;align-items:center;gap:36px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.02em;color:var(--ink)}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--fire)}
.brand .vision{font-weight:650;letter-spacing:-.035em}
.brand .sub{font-family:var(--mono);font-size:10px;font-weight:600;color:var(--fire-deep);letter-spacing:.16em;margin-left:2px;margin-top:4px}
.nav-links{display:flex;gap:28px;margin-left:auto;align-items:center}
.nav-links a{font-size:14.5px;color:var(--mut);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink);font-weight:700}
.nav-links a.btn{
  color:#fff;font-size:13.5px;font-weight:700;
  padding:9px 18px;border-radius:9px;margin-left:4px;
}
.nav-links a.btn:hover{color:#fff;transform:none;box-shadow:none;background:var(--fire-deep)}
.nav-toggle{
  display:none;width:40px;height:40px;flex:none;
  border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0;
  margin-left:auto;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--ink);border-radius:2px;transition:transform .25s,opacity .2s}
.nav.open .nav-toggle span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav.open .nav-toggle span:nth-child(2){opacity:0}
.nav.open .nav-toggle span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:10px;font-size:14.5px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:all .2s;
  letter-spacing:-.01em;
}
.btn-fire{background:var(--fire);color:#fff}
.btn-fire:hover{background:var(--fire-deep);transform:translateY(-1px);box-shadow:0 8px 20px -6px rgba(224,62,34,.45)}
.btn-ghost{border-color:#d9d6ce;color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:#b9b5aa}
.btn-lg{padding:15px 30px;font-size:16px;border-radius:12px}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- sections ---------- */
section{padding:128px 0;position:relative}
section.tight{padding:88px 0}
.sec-head{margin-bottom:72px}
.divider{height:1px;background:var(--line)}
.band{background:var(--bg-2)}

/* ---------- chips / badges ---------- */
.chip{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:11.5px;font-weight:500;letter-spacing:.04em;
  padding:5px 12px;border-radius:999px;border:1px solid var(--line);color:var(--mut);
  background:#fff;
}
.chip .led{width:6px;height:6px;border-radius:50%}
.led.red{background:var(--fire)}
.led.blue{background:var(--safe)}
.led.green{background:#1ca35e}
.badge-ok{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:700;color:var(--ok);
  background:var(--ok-soft);border:1px solid #cfe6da;
  padding:4px 12px;border-radius:999px;white-space:nowrap;
}
.badge-ok::before{content:"•";font-weight:800}

/* ---------- cards ---------- */
.card{
  background:var(--panel);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:34px;position:relative;overflow:hidden;
  box-shadow:var(--shadow-card);
}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ---------- bounding boxes (used inside dark panels) ---------- */
.bbox{position:absolute;pointer-events:none}
.bbox .frame{
  position:absolute;inset:0;border:1.5px solid currentColor;border-radius:2px;
  box-shadow:0 0 0 1px rgba(0,0,0,.35);
}
.bbox .frame::before,.bbox .frame::after,
.bbox .frame b::before,.bbox .frame b::after{
  content:"";position:absolute;width:9px;height:9px;border:2.5px solid currentColor
}
.bbox .frame::before{top:-2px;left:-2px;border-right:0;border-bottom:0}
.bbox .frame::after{top:-2px;right:-2px;border-left:0;border-bottom:0}
.bbox .frame b::before{bottom:-2px;left:-2px;border-right:0;border-top:0}
.bbox .frame b::after{bottom:-2px;right:-2px;border-left:0;border-top:0}
.bbox .tag{
  position:absolute;top:-26px;left:0;display:inline-flex;align-items:center;gap:6px;
  font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.02em;
  padding:3px 9px;border-radius:4px;color:#fff;white-space:nowrap;
}
.bbox.fire{color:#ff5a3c}
.bbox.fire .tag{background:#e03e22}
.bbox.safe{color:#57a9ff}
.bbox.safe .tag{background:#2f6fd8}

/* ---------- monitor / CCTV frame (dark product UI) ---------- */
.monitor{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid #23272f;
  background:#05070b;
  box-shadow:var(--shadow-deep);
}
.monitor .scene{
  position:absolute;inset:0;
  transition:transform 2.2s cubic-bezier(.6,.05,.3,1);
  transform-origin:var(--zx,70%) var(--zy,60%);
}
.monitor.zoomed .scene{transform:scale(1.85)}
.monitor .scanlines{
  position:absolute;inset:0;pointer-events:none;opacity:.4;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.025) 0 1px,transparent 1px 3px);
}
.monitor .vig{
  position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 100% at 50% 40%,transparent 55%,rgba(0,0,0,.5));
}
.hud{position:absolute;inset:0;pointer-events:none;font-family:var(--mono)}
.hud .row{position:absolute;left:14px;right:14px;display:flex;justify-content:space-between;align-items:center}
.hud .row.top{top:12px}
.hud .row.bot{bottom:12px}
.hud .item{
  font-size:10.5px;letter-spacing:.08em;color:rgba(238,242,248,.85);
  background:rgba(5,7,11,.55);padding:3px 9px;border-radius:4px;backdrop-filter:blur(3px);
  display:flex;align-items:center;gap:7px;
}
.hud .rec{width:7px;height:7px;border-radius:50%;background:#ff4d2e;animation:pulse 1.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.hud .cross{
  position:absolute;top:50%;left:50%;width:34px;height:34px;transform:translate(-50%,-50%);
  opacity:.35;
}
.hud .cross::before,.hud .cross::after{content:"";position:absolute;background:rgba(238,242,248,.9)}
.hud .cross::before{left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%)}
.hud .cross::after{top:50%;left:0;right:0;height:1px;transform:translateY(-50%)}
.zoom-note{
  position:absolute;top:46px;left:14px;font-family:var(--mono);font-size:10.5px;
  letter-spacing:.1em;color:#ffc252;background:rgba(5,7,11,.6);
  padding:3px 9px;border-radius:4px;opacity:0;transition:opacity .4s;
}
.monitor.zoomed .zoom-note,.monitor.verify .zoom-note{opacity:1}

/* ---------- console (dark product UI) ---------- */
.console{
  background:var(--dk);border:1px solid #23272f;border-radius:var(--r-md);
  font-family:var(--mono);font-size:12.5px;overflow:hidden;
  box-shadow:var(--shadow-card);
}
.console .bar{
  display:flex;align-items:center;gap:8px;padding:10px 16px;
  border-bottom:1px solid var(--dk-line);color:var(--dk-dim);
  font-size:11px;letter-spacing:.1em;
}
.console .bar .dots{display:flex;gap:5px}
.console .bar .dots i{width:8px;height:8px;border-radius:50%;background:#2a3140}
.console .body{padding:16px 18px;min-height:118px;line-height:1.8;color:var(--dk-mut)}
.console .ln{display:block}
.console .k{color:var(--dk-dim)}
.console .v-safe{color:#6fb1ff}
.console .v-fire{color:#ff7a5c}
.console .v-ok{color:#4ade8c}
.console .caret{display:inline-block;width:7px;height:14px;background:var(--dk-mut);vertical-align:-2px;animation:pulse 1s steps(2) infinite}

/* ---------- paper document (customer requirement excerpt) ---------- */
.paper{
  background:linear-gradient(145deg,#fff 0%,#fbfaf6 100%);color:var(--paper-ink);
  border:1px solid #dfdcd3;
  border-radius:18px;padding:28px 30px 30px;position:relative;
  box-shadow:0 1px 1px rgba(25,28,34,.025),0 14px 34px -28px rgba(25,28,34,.32);
}
.paper::before{display:none}
.paper .doc-tag{
  display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.12em;
  color:var(--paper-mut);margin-bottom:18px;padding-bottom:15px;
  border-bottom:1px solid #e9e6df;text-transform:uppercase;
}
.paper .doc-tag::before{
  content:"§";display:inline-flex;align-items:center;justify-content:center;flex:none;
  width:26px;height:26px;border-radius:8px;border:1px solid #e1ddd3;
  background:#fff;color:var(--fire-deep);font-size:12px;box-shadow:0 1px 2px rgba(25,28,34,.04);
}
.paper h4{font-size:17px;font-weight:800;letter-spacing:-.02em;line-height:1.45;margin-bottom:12px}
.paper p{font-size:14.5px;line-height:1.82;color:#4d5057}
.paper u{
  text-decoration:none;font-weight:700;color:var(--paper-ink);
  background:linear-gradient(transparent 68%,rgba(224,62,34,.12) 68%);
}

/* ---------- requirement mapping rows ---------- */
.req-row{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:44px;
  padding:60px 0;border-top:1px solid var(--line);align-items:start;
}
.req-row:last-child{border-bottom:1px solid var(--line)}
.req-num{
  font-family:var(--mono);font-size:12px;color:var(--dim);letter-spacing:.14em;
  margin-bottom:14px;display:flex;align-items:center;gap:12px;
}
.req-num .badge-ok{margin-left:0}
.answer h4{font-size:21px;font-weight:800;letter-spacing:-.025em;margin-bottom:14px;line-height:1.35}
.answer h4 .hl{color:var(--fire-deep)}
.answer p{color:var(--mut);font-size:15px;line-height:1.75;margin-bottom:18px}
.answer ul{list-style:none;display:flex;flex-direction:column;gap:11px;margin-top:4px}
.answer li{
  position:relative;padding-left:26px;font-size:14.5px;color:var(--mut);line-height:1.65;
}
.answer li::before{
  content:"";position:absolute;left:2px;top:9px;width:10px;height:5px;
  border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);
  transform:rotate(-45deg);
}
.answer li strong{color:var(--ink);font-weight:700}

/* ---------- stat band ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:var(--panel);box-shadow:var(--shadow-card);
}
.stat{padding:40px 34px;border-left:1px solid var(--line-soft)}
.stat:first-child{border-left:0}
.stat .num{
  font-size:clamp(34px,3.6vw,46px);font-weight:800;letter-spacing:-.04em;line-height:1;
  display:flex;align-items:baseline;gap:4px;color:var(--ink);
}
.stat .num .u{font-size:.45em;color:var(--dim);font-weight:600}
.stat .lab{font-size:14px;color:var(--mut);margin-top:14px;line-height:1.6}
.stat .lab b{display:block;color:var(--ink);margin-bottom:2px}
.stat.fire .num{color:var(--fire-deep)}
.stat.safe .num{color:var(--safe)}
.stat.ok .num{color:var(--ok)}

/* ---------- compliance table ---------- */
.matrix-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--shadow-card)}
table.matrix{width:100%;border-collapse:collapse;font-size:14px;min-width:860px}
.matrix thead th{
  font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;color:var(--dim);text-align:left;
  padding:16px 20px;border-bottom:1px solid var(--line);
  background:var(--bg);
}
.matrix tbody td{
  padding:18px 20px;border-bottom:1px solid var(--line-soft);
  vertical-align:top;color:var(--mut);line-height:1.6;
}
.matrix tbody tr:last-child td{border-bottom:0}
.matrix tbody tr:hover td{background:#fcfcfa}
.matrix td.name{color:var(--ink);font-weight:700;white-space:nowrap}
.matrix td.name .cat{
  display:block;font-family:var(--mono);font-size:10px;font-weight:500;
  color:var(--dim);letter-spacing:.1em;margin-bottom:5px;
}
.matrix .crit{font-family:var(--mono);font-size:12.5px;color:var(--amber)}

/* ---------- pipeline ---------- */
.pipeline{display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative}
.pipe-step{padding:40px 36px;position:relative}
.pipe-step + .pipe-step{border-left:1px dashed var(--line)}
.pipe-step .stage{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--fire-deep);
  margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.pipe-step .stage .num{
  width:26px;height:26px;border-radius:50%;border:1px solid #f3c4ba;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:11px;color:var(--fire-deep);background:var(--fire-soft);
}
.pipe-step h3{font-size:19px;margin-bottom:12px;letter-spacing:-.02em}
.pipe-step p{font-size:14.5px;color:var(--mut);line-height:1.7}
.pipe-step .specs{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:56px 0 40px;background:var(--bg-2)}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap}
.foot .col p{font-size:13.5px;color:var(--dim);margin-top:10px;line-height:1.7}
.foot a.mail{color:var(--mut);font-family:var(--mono);font-size:13px;border-bottom:1px solid #d5d2c9;padding-bottom:2px;transition:color .2s}
.foot a.mail:hover{color:var(--ink)}
.foot-base{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;color:var(--dim);letter-spacing:.06em;flex-wrap:wrap;gap:10px}

/* ---------- reveal ---------- */
/* Content stays readable when JavaScript is unavailable. */
.rv{opacity:1;transform:none}
.js .rv{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.6,.2,1),transform .8s cubic-bezier(.2,.6,.2,1)}
.js .rv.in{opacity:1;transform:none}
.js .rv.d1{transition-delay:.08s}.js .rv.d2{transition-delay:.16s}.js .rv.d3{transition-delay:.24s}.js .rv.d4{transition-delay:.32s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .rv{opacity:1;transform:none;transition:none}
  .hud .rec,.console .caret{animation:none}
}

/* ---------- CTA band (dark contrast block) ---------- */
.cta-band{
  border-radius:24px;
  background:
    radial-gradient(700px 300px at 15% 0%,rgba(224,62,34,.16),transparent 60%),
    var(--dk);
  padding:80px 60px;text-align:center;position:relative;overflow:hidden;
  box-shadow:var(--shadow-deep);
}
.cta-band .eyebrow{color:#ff8a70}
.cta-band .eyebrow .n{color:#66707f}
.cta-band .eyebrow::after{background:#ff8a70}
.cta-band h2{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.035em;margin-bottom:16px;color:#fff}
.cta-band p{color:#a7b0bf;max-width:560px;margin:0 auto 34px}
.cta-band .btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta-band .btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.cta-band .btn-ghost:hover{border-color:rgba(255,255,255,.5)}

/* ---------- dark mini visual panel (product UI inset) ---------- */
.mini{
  border:1px solid #23272f;border-radius:var(--r-md);overflow:hidden;
  background:var(--dk);margin-top:20px;box-shadow:var(--shadow-card);
}
.mini .mhead{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--dk-dim);
  padding:10px 16px;border-bottom:1px solid var(--dk-line);
}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-top:1px solid var(--line-soft)}
  .stat:nth-child(-n+2){border-top:0}
  .stat:nth-child(odd){border-left:0}
  .pipeline{grid-template-columns:1fr}
  .pipe-step + .pipe-step{border-left:0;border-top:1px dashed var(--line)}
  .req-row{grid-template-columns:1fr;gap:22px}
}
@media (max-width:760px){
  section{padding:76px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .nav-toggle{display:flex}
  .nav.open{background:rgba(250,250,247,.98);backdrop-filter:blur(14px);border-color:var(--line)}
  .nav-links{
    display:none;position:absolute;top:68px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:var(--bg);
    border-bottom:1px solid var(--line);padding:6px 28px 20px;
    box-shadow:0 20px 32px -20px rgba(25,28,34,.2);
  }
  .nav.open{background:var(--bg)}
  .nav.open .nav-links{display:flex}
  .nav-links a{display:block;padding:14px 2px;font-size:15.5px;border-bottom:1px solid var(--line-soft)}
  .nav-links a.btn{display:inline-flex;justify-content:center;margin:16px 0 0;border-bottom:0;padding:12px 18px}
  .cta-band{padding:52px 26px}
  .stats{grid-template-columns:1fr}
  .stat{border-left:0;border-top:1px solid var(--line-soft)}
  .stat:first-child{border-top:0}
}