/* ==========================================================================
   JK Total Solutions — Industrial Re-Flooring
   Design system: industrial / engineering / high-end B2B
   Dark concrete grays + white + single amber accent
   ========================================================================== */

:root{
  --ink-900:#0d1116;
  --ink-800:#12171f;
  --ink-700:#1a212b;
  --ink-600:#242d3a;
  --ink-500:#38424f;
  --steel-400:#6b7787;
  --steel-300:#98a3b1;
  --steel-200:#c6cdd6;
  --concrete-100:#eceef1;
  --concrete-50:#f5f6f8;
  --white:#ffffff;

  --amber:#e0813a;
  --amber-bright:#f5a15b;
  --amber-dim:rgba(224,129,58,.14);

  --ok:#2f9e6a;
  --warn:#d8a22a;
  --alert:#c95a3c;

  --font-sans:"Inter","Helvetica Neue",Helvetica,-apple-system,BlinkMacSystemFont,"Segoe UI","Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",Arial,sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --maxw:1200px;
  --gutter:clamp(20px,5vw,48px);
  --radius:4px;
  --radius-lg:8px;

  --header-h:72px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.65;
  color:var(--ink-800);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden}

img,svg,video{max-width:100%;height:auto;display:block}

h1,h2,h3,h4{margin:0 0 .5em;line-height:1.14;font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5.6vw,3.9rem)}
h2{font-size:clamp(1.6rem,3.6vw,2.5rem)}
h3{font-size:clamp(1.15rem,2vw,1.4rem)}
h4{font-size:1.02rem;font-weight:700;letter-spacing:0}
p{margin:0 0 1.1em}
a{color:inherit}
ul,ol{margin:0 0 1.1em;padding-left:1.15em}
li{margin-bottom:.4em}
hr{border:0;border-top:1px solid var(--concrete-100);margin:2.5rem 0}

/* ---------- utilities ---------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-narrow{max-width:820px;margin-inline:auto;padding-inline:var(--gutter)}
.section{padding:clamp(56px,8vw,104px) 0}
.section--tight{padding:clamp(40px,5vw,64px) 0}
.section--dark{background:var(--ink-900);color:var(--concrete-100)}
.section--deep{background:var(--ink-800);color:var(--concrete-100)}
.section--gray{background:var(--concrete-50)}
.section--dark h2,.section--dark h3,.section--deep h2,.section--deep h3{color:var(--white)}
.center{text-align:center}
.mono{font-family:var(--font-mono)}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.eyebrow{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--amber);margin:0 0 14px;font-weight:600;display:block;
}
.section--dark .eyebrow,.section--deep .eyebrow{color:var(--amber-bright)}

.lede{font-size:clamp(1.02rem,1.6vw,1.18rem);color:var(--ink-500);max-width:64ch}
.section--dark .lede,.section--deep .lede{color:var(--steel-200)}

.rule{width:44px;height:3px;background:var(--amber);margin-bottom:22px}
.center .rule{margin-inline:auto}

.grid{display:grid;gap:clamp(16px,2.4vw,26px)}
.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(268px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}

/* ---------- skip link ---------- */
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--amber);color:#111;padding:12px 20px;font-weight:700}
.skip:focus{left:12px;top:12px}

:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:3px solid var(--amber-bright);outline-offset:2px;border-radius:2px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 26px;font-weight:700;font-size:.95rem;letter-spacing:.01em;
  border-radius:var(--radius);border:1px solid transparent;cursor:pointer;
  text-decoration:none;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
  line-height:1.2;text-align:center;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--amber);color:#14181d}
.btn--primary:hover{background:var(--amber-bright)}
.btn--ghost{background:transparent;color:var(--white);border-color:rgba(255,255,255,.34)}
.btn--ghost:hover{background:rgba(255,255,255,.09);border-color:var(--white)}
.btn--dark{background:var(--ink-800);color:var(--white)}
.btn--dark:hover{background:var(--ink-600)}
.btn--outline{background:transparent;color:var(--ink-800);border-color:var(--ink-500)}
.btn--outline:hover{background:var(--ink-800);color:var(--white)}
.btn--sm{padding:10px 18px;font-size:.86rem}
.btn--block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
.center .btn-row{justify-content:center}

.arrow-link{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;text-decoration:none;
  color:var(--ink-800);border-bottom:2px solid var(--amber);padding-bottom:2px;font-size:.93rem;
}
.section--dark .arrow-link,.section--deep .arrow-link{color:var(--white)}
.arrow-link span{transition:transform .18s var(--ease)}
.arrow-link:hover span{transform:translateX(4px)}

/* ---------- header ---------- */
.topbar{
  background:var(--ink-900);color:var(--steel-300);font-size:.79rem;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:38px;flex-wrap:wrap}
.topbar a{color:var(--steel-200);text-decoration:none}
.topbar a:hover{color:var(--white)}
.topbar .tb-tag{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--steel-400)}
.topbar .tb-links{display:flex;gap:16px;align-items:center}
.lang-switch{display:inline-flex;border:1px solid rgba(255,255,255,.22);border-radius:100px;overflow:hidden}
.lang-switch button{
  font:inherit;font-size:.72rem;font-weight:700;letter-spacing:.04em;padding:5px 12px;cursor:pointer;
  background:transparent;color:var(--steel-300);border:0;line-height:1.5;transition:background .16s,color .16s;
}
.lang-switch button:hover{color:var(--white);background:rgba(255,255,255,.08)}
.lang-switch button[aria-pressed="true"]{background:var(--amber);color:#14181d}
html[lang="ko"] body{word-break:keep-all;line-height:1.72}
html[lang="ko"] h1,html[lang="ko"] h2,html[lang="ko"] h3{letter-spacing:-.03em;line-height:1.28}
html[lang="ko"] .mono,html[lang="ko"] .eyebrow{letter-spacing:.08em}
@media (max-width:640px){.topbar .tb-links{gap:12px}.topbar .tb-links a.kr{display:none}}
@media (max-width:640px){.topbar .tb-tag{display:none}.topbar .wrap{justify-content:center}}

.site-header{
  position:sticky;top:0;z-index:100;background:rgba(13,17,22,.96);
  backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.09);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 8px 30px rgba(0,0,0,.35)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h);gap:20px}

.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}
.brand .mark{width:34px;height:34px;flex:0 0 34px}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text b{color:var(--white);font-size:.95rem;letter-spacing:.04em;font-weight:800}
.brand-text i{color:var(--amber);font-size:.63rem;font-style:normal;font-family:var(--font-mono);letter-spacing:.17em;text-transform:uppercase}

.nav{display:flex;align-items:center;gap:4px}
.nav a,.nav button.navtop{
  color:var(--steel-200);text-decoration:none;font-size:.85rem;font-weight:600;
  padding:10px 10px;border-radius:var(--radius);background:none;border:0;cursor:pointer;
  font-family:inherit;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
}
@media (min-width:1041px) and (max-width:1300px){
  .nav a,.nav button.navtop{font-size:.8rem;padding:10px 7px}
  .header-phone{display:none}
}
.nav a:hover,.nav button.navtop:hover{color:var(--white);background:rgba(255,255,255,.07)}
.nav a[aria-current="page"]{color:var(--white)}
.nav a[aria-current="page"]::after{content:"";display:block;position:absolute;bottom:-2px;left:12px;right:12px;height:2px;background:var(--amber)}
.nav .has-drop{position:relative}
.nav .drop{
  position:absolute;top:calc(100% + 8px);left:0;min-width:264px;background:var(--ink-800);
  border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);padding:8px;
  box-shadow:0 20px 44px rgba(0,0,0,.45);display:none;
}
.nav .has-drop.open .drop{display:block}
.nav .drop a{display:block;padding:10px 12px;font-weight:600;font-size:.86rem}
.nav .drop a small{display:block;color:var(--steel-400);font-weight:500;font-size:.74rem;margin-top:2px}
.nav .caret{width:9px;height:9px;transition:transform .18s var(--ease)}
.nav .has-drop.open .caret{transform:rotate(180deg)}

.header-cta{display:flex;align-items:center;gap:12px}
.header-phone{color:var(--white);text-decoration:none;font-weight:700;font-size:.9rem;white-space:nowrap}
.header-phone:hover{color:var(--amber-bright)}

.nav-toggle{
  display:none;width:44px;height:44px;background:transparent;border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius);cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--white);transition:transform .22s var(--ease),opacity .18s}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:1040px){
  .nav-toggle{display:flex}
  .header-cta .btn{display:none}
  .site-header .wrap{flex-wrap:nowrap;gap:12px}
  .brand{min-width:0;overflow:hidden}
  .nav{
    position:fixed;inset:var(--header-h) 0 0 auto;width:min(360px,100%);background:var(--ink-900);
    flex-direction:column;align-items:stretch;gap:0;padding:18px var(--gutter) 60px;
    overflow-y:auto;transform:translateX(102%);transition:transform .26s var(--ease);
    border-left:1px solid rgba(255,255,255,.1);
  }
  body.nav-open .nav{transform:translateX(0)}
  .nav a,.nav button.navtop{padding:14px 4px;font-size:1rem;width:100%;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.07)}
  .nav .drop{position:static;display:none;box-shadow:none;border:0;background:rgba(255,255,255,.03);margin:0 0 8px;padding:4px 0 8px 12px}
  .nav .has-drop.open .drop{display:block}
  .nav .mobile-cta{margin-top:22px;display:block}
  .nav .mobile-cta .btn{width:100%;margin-bottom:10px}
}
@media (min-width:1041px){.nav .mobile-cta{display:none}}
@media (max-width:820px){
  .header-phone{display:none}
  .brand-text b{font-size:.86rem}
  .brand .mark{width:30px;height:30px;flex:0 0 30px}
}

/* ---------- video hero ---------- */
.hero--video{position:relative;isolation:isolate;min-height:min(86vh,780px);display:flex;align-items:center}
.hero--video::before,.hero--video::after{display:none}
.hero-media{position:absolute;inset:0;overflow:hidden;z-index:0}
.hero-media video,.hero-media img{
  width:100%;height:100%;object-fit:cover;display:block;
  filter:brightness(1.42) contrast(1.06) saturate(.92);
  transform:scale(1.06);
  animation:heroDrift 26s ease-in-out infinite alternate;
  will-change:transform;
}
@keyframes heroDrift{from{transform:scale(1.04) translate3d(0,0,0)}to{transform:scale(1.13) translate3d(-1.6%,-1.2%,0)}}
@media (prefers-reduced-motion:reduce){.hero-media video,.hero-media img{animation:none;transform:none}}
.hero-scrim{
  position:absolute;inset:0;
  background:
    linear-gradient(98deg,rgba(9,12,16,.9) 0%,rgba(9,12,16,.72) 34%,rgba(9,12,16,.3) 62%,rgba(9,12,16,.12) 100%),
    linear-gradient(180deg,rgba(9,12,16,.62) 0%,rgba(9,12,16,.05) 40%,rgba(9,12,16,.72) 100%),
    radial-gradient(120% 90% at 72% 45%,transparent 30%,rgba(9,12,16,.55) 100%);
}
.hero-scrim::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(circle at 78% 30%,#000 0%,transparent 70%);
}
.hero--video::after{
  content:"";position:absolute;left:0;right:0;z-index:1;pointer-events:none;
  height:clamp(28px,5vh,64px);bottom:0;
  background:linear-gradient(180deg,transparent,rgba(9,12,16,.92));
}
.hero--video .wrap{position:relative;z-index:2;width:100%}
.hero--video .hero-copy .hero-sub{color:#c6cdd6;text-shadow:0 1px 14px rgba(9,12,16,.85)}
.hero--video h1,.hero--video .hero-tag{text-shadow:0 2px 24px rgba(9,12,16,.75)}
.hero--video .hero-copy{max-width:760px}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;background:rgba(224,129,58,.16);border:1px solid rgba(224,129,58,.5);
  color:#f5a15b;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  padding:7px 14px;border-radius:100px;margin-bottom:20px;font-weight:600;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:#f5a15b;display:block;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.7)}}
.video-note{
  position:absolute;right:var(--gutter);bottom:18px;z-index:2;font-family:var(--font-mono);font-size:.66rem;
  letter-spacing:.12em;text-transform:uppercase;color:rgba(198,205,214,.5);
}
@media (max-width:760px){.video-note{display:none}}
@media (prefers-reduced-motion:reduce){.hero-badge i{animation:none}}

/* ---------- hero ---------- */
.hero{
  position:relative;background:var(--ink-900);color:var(--white);overflow:hidden;
  padding:clamp(64px,10vw,124px) 0 clamp(48px,7vw,88px);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(circle at 72% 34%,#000 0%,transparent 72%);
}
.hero::after{
  content:"";position:absolute;right:-14%;top:-24%;width:60vw;height:60vw;border-radius:50%;
  background:radial-gradient(circle,rgba(224,129,58,.2) 0%,transparent 62%);pointer-events:none;
}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(30px,5vw,64px);align-items:center}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}
.hero h1{color:var(--white);margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--amber);display:block}
.hero-tag{font-size:clamp(1.15rem,2.2vw,1.5rem);font-weight:600;color:var(--concrete-100);margin-bottom:16px;line-height:1.34}
.hero-sub{color:var(--steel-300);max-width:54ch;font-size:1.02rem}
.hero-stats{display:flex;flex-wrap:wrap;gap:clamp(18px,4vw,44px);margin-top:36px;padding-top:26px;border-top:1px solid rgba(255,255,255,.12)}
.hero-stats div b{display:block;font-size:clamp(1.5rem,3vw,2rem);color:var(--white);font-weight:800;letter-spacing:-.02em}
.hero-stats div > span{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:var(--steel-400)}

.page-hero{background:var(--ink-900);color:var(--white);padding:clamp(48px,7vw,86px) 0 clamp(40px,6vw,64px);position:relative;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px;mask-image:linear-gradient(100deg,#000 0%,transparent 70%);
}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{color:var(--white);max-width:20ch}
.page-hero .lede{color:var(--steel-300);max-width:62ch}

.crumbs{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--steel-400);margin-bottom:18px}
.crumbs a{color:var(--steel-300);text-decoration:none}
.crumbs a:hover{color:var(--amber-bright)}
.crumbs > span{margin:0 8px;color:var(--ink-500)}

/* ---------- cards ---------- */
.card{
  background:var(--white);border:1px solid var(--concrete-100);border-radius:var(--radius-lg);
  padding:clamp(20px,2.6vw,30px);transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  display:flex;flex-direction:column;
}
a.card{text-decoration:none;color:inherit}
a.card:hover{border-color:var(--amber);transform:translateY(-3px);box-shadow:0 16px 36px rgba(13,17,22,.09)}
.card h3{margin-bottom:8px}
.card p{color:var(--ink-500);font-size:.94rem;margin-bottom:14px}
.card .card-foot{margin-top:auto;padding-top:8px;font-size:.84rem;font-weight:700;color:var(--amber);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase}
.card-num{font-family:var(--font-mono);font-size:.74rem;color:var(--steel-400);letter-spacing:.14em;margin-bottom:12px}

.card--dark{background:var(--ink-700);border-color:rgba(255,255,255,.09);color:var(--concrete-100)}
.card--dark h3{color:var(--white)}
.card--dark p{color:var(--steel-300)}
a.card--dark:hover{border-color:var(--amber)}

.icon-tile{width:46px;height:46px;border-radius:var(--radius);background:var(--amber-dim);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.icon-tile svg{width:24px;height:24px;stroke:var(--amber);fill:none;stroke-width:1.7}

/* ---------- problem list ---------- */
.pain-list{list-style:none;padding:0;margin:0;display:grid;gap:1px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.09);border-radius:var(--radius-lg);overflow:hidden}
.pain-list li{margin:0;background:var(--ink-800);padding:16px 20px;display:flex;align-items:center;gap:14px;font-weight:600;color:var(--concrete-100);font-size:.95rem}
.pain-list li::before{content:"";width:7px;height:7px;background:var(--alert);border-radius:50%;flex:0 0 7px}

/* ---------- process stepper ---------- */
.stepper{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.stepper button{
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.09em;text-transform:uppercase;font-weight:600;
  padding:11px 15px;border-radius:var(--radius);border:1px solid rgba(255,255,255,.16);
  background:transparent;color:var(--steel-300);cursor:pointer;transition:all .18s var(--ease);
}
.stepper button:hover{border-color:var(--amber);color:var(--white)}
.stepper button[aria-selected="true"]{background:var(--amber);border-color:var(--amber);color:#14181d}
.step-panel{
  border:1px solid rgba(255,255,255,.11);border-radius:var(--radius-lg);padding:clamp(22px,3.4vw,34px);
  background:var(--ink-800);min-height:190px;
}
.step-panel[hidden]{display:none}
.step-panel .step-idx{font-family:var(--font-mono);color:var(--amber);font-size:.78rem;letter-spacing:.16em;margin-bottom:10px}
.step-panel h3{color:var(--white);margin-bottom:10px}
.step-panel p{color:var(--steel-200);margin-bottom:14px}
.step-panel ul{color:var(--steel-300);font-size:.92rem;margin:0;padding-left:1.1em}

/* ---------- before / after slider ---------- */
.ba{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(255,255,255,.14);user-select:none;touch-action:pan-y;background:var(--ink-700)}
.ba-media{position:relative;aspect-ratio:16/9}
.ba-media > svg{position:absolute;inset:0;width:100%;height:100%}
.ba-after{position:absolute;inset:0;clip-path:inset(0 0 0 50%);will-change:clip-path}
.ba-after > svg{position:absolute;inset:0;width:100%;height:100%}
.ba-handle{
  position:absolute;top:0;bottom:0;left:50%;width:3px;background:var(--amber);transform:translateX(-50%);
  cursor:ew-resize;z-index:3;
}
.ba-handle::after{
  content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:44px;height:44px;border-radius:50%;background:var(--amber);
  box-shadow:0 4px 18px rgba(0,0,0,.5);
}
.ba-handle::before{
  content:"◀ ▶";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2;
  font-size:.6rem;color:#14181d;letter-spacing:1px;font-weight:700;
}
.ba-range{position:absolute;inset:0;width:100%;opacity:0;cursor:ew-resize;z-index:4;margin:0}
.ba-label{
  position:absolute;bottom:14px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  background:rgba(13,17,22,.82);color:var(--white);padding:6px 12px;border-radius:2px;z-index:2;
}
.ba-label.l{left:14px}
.ba-label.r{right:14px;color:var(--amber-bright)}

/* ---------- diagnostic tool ---------- */
.tool{
  background:var(--ink-800);border:1px solid rgba(255,255,255,.11);border-radius:var(--radius-lg);
  padding:clamp(22px,3.4vw,38px);
}
.tool-light{background:var(--white);border-color:var(--concrete-100);box-shadow:0 20px 48px rgba(13,17,22,.07)}
.checkgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:10px;margin-bottom:24px}
.chk{
  display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);cursor:pointer;transition:all .16s var(--ease);background:rgba(255,255,255,.02);
}
.tool-light .chk{border-color:var(--concrete-100);background:var(--concrete-50)}
.chk:hover{border-color:var(--amber)}
.chk input{margin-top:3px;accent-color:var(--amber);width:17px;height:17px;flex:0 0 17px}
.chk > span{font-size:.9rem;font-weight:600;line-height:1.4;color:var(--concrete-100)}
.tool-light .chk > span{color:var(--ink-800)}
.chk small{display:block;font-weight:500;color:var(--steel-400);font-size:.78rem;margin-top:2px}
.chk input:checked ~ span{color:var(--white)}
.tool-light .chk input:checked ~ span{color:var(--ink-900)}
.chk:has(input:checked){border-color:var(--amber);background:var(--amber-dim)}

.result{
  border-left:3px solid var(--amber);background:rgba(224,129,58,.09);padding:20px 22px;border-radius:0 var(--radius) var(--radius) 0;
}
.result h4{color:var(--white);margin-bottom:8px}
.tool-light .result h4{color:var(--ink-900)}
.result p{margin:0 0 10px;color:var(--steel-200);font-size:.94rem}
.tool-light .result p{color:var(--ink-500)}
.result .rec{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;font-weight:600;
  padding:6px 11px;border-radius:2px;background:var(--amber);color:#14181d;text-decoration:none;display:inline-block;
}
.tag--quiet{background:rgba(255,255,255,.09);color:var(--steel-200)}
.tool-light .tag--quiet{background:var(--concrete-100);color:var(--ink-600)}

/* ---------- planner ---------- */
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;font-size:.86rem;margin-bottom:7px;color:var(--concrete-100)}
.tool-light .field label,form.form-block .field label{color:var(--ink-800)}
.field .hint{font-weight:500;color:var(--steel-400);font-size:.78rem;display:block;margin-top:5px}
.field input[type=text],.field input[type=email],.field input[type=tel],.field input[type=number],.field select,.field textarea{
  width:100%;padding:13px 14px;border-radius:var(--radius);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);color:var(--white);font:inherit;font-size:.95rem;
}
.tool-light .field input,.tool-light .field select,.tool-light .field textarea,
form.form-block .field input,form.form-block .field select,form.form-block .field textarea{
  background:var(--white);border-color:var(--steel-200);color:var(--ink-900);
}
.field input[type=range]{width:100%;accent-color:var(--amber)}
.field textarea{min-height:120px;resize:vertical}
.field select option{color:#111;background:#fff}
.field .err{color:var(--alert);font-size:.79rem;font-weight:600;margin-top:6px;display:none}
.field.invalid .err{display:block}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--alert)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:600px){.field-row{grid-template-columns:1fr}}

.readout{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);overflow:hidden;margin-top:22px}
.tool-light .readout{background:var(--concrete-100);border-color:var(--concrete-100)}
.readout div{background:var(--ink-700);padding:18px}
.tool-light .readout div{background:var(--white)}
.readout b{display:block;font-size:1.55rem;font-weight:800;color:var(--white);letter-spacing:-.02em;line-height:1.2}
.tool-light .readout b{color:var(--ink-900)}
.readout div > span{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--steel-400)}
.disclaimer{font-size:.78rem;color:var(--steel-400);margin-top:14px;line-height:1.55}

/* ---------- tabs ---------- */
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--concrete-100);margin-bottom:28px}
.tabs button{
  background:none;border:0;border-bottom:3px solid transparent;padding:13px 16px;font:inherit;font-weight:700;
  font-size:.92rem;color:var(--steel-400);cursor:pointer;margin-bottom:-1px;
}
.tabs button:hover{color:var(--ink-800)}
.tabs button[aria-selected="true"]{color:var(--ink-900);border-bottom-color:var(--amber)}
.tabpanel[hidden]{display:none}

/* ---------- accordion ---------- */
.acc{border-top:1px solid var(--concrete-100)}
.acc details{border-bottom:1px solid var(--concrete-100)}
.acc summary{
  list-style:none;cursor:pointer;padding:20px 44px 20px 0;font-weight:700;font-size:1.02rem;position:relative;
}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{
  content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);font-size:1.5rem;font-weight:400;color:var(--amber);
}
.acc details[open] summary::after{content:"−"}
.acc .acc-body{padding:0 44px 22px 0;color:var(--ink-500);font-size:.96rem}
.acc .acc-body p:last-child{margin-bottom:0}

/* ---------- spec table ---------- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.spec{width:100%;border-collapse:collapse;font-size:.92rem;min-width:560px}
table.spec th,table.spec td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--concrete-100);vertical-align:top}
table.spec thead th{
  background:var(--ink-900);color:var(--white);font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.13em;text-transform:uppercase;font-weight:600;border-bottom:0;
}
table.spec tbody tr:nth-child(even){background:var(--concrete-50)}
table.spec td strong{color:var(--ink-900)}

/* ---------- code block ---------- */
.codeblock{
  background:var(--ink-900);color:var(--concrete-100);border-radius:var(--radius-lg);padding:22px 24px;
  font-family:var(--font-mono);font-size:.82rem;line-height:1.8;overflow-x:auto;white-space:pre;
  border:1px solid rgba(255,255,255,.09);
}
.codeblock .hl{color:var(--amber-bright)}

/* ---------- coverage map ---------- */
.map-wrap{position:relative}
.map-legend{display:flex;flex-wrap:wrap;gap:16px;margin-top:18px;font-size:.84rem}
.map-legend i{width:12px;height:12px;border-radius:2px;display:inline-block;margin-right:7px;vertical-align:-1px}
.map-legend > span{display:inline-flex;align-items:center;color:var(--steel-300)}
.city-btn{cursor:pointer}
.city-btn:hover circle{r:7}

/* ---------- CTA band ---------- */
.cta-band{background:var(--amber);color:#14181d;padding:clamp(40px,6vw,64px) 0}
.cta-band h2{color:#14181d;max-width:22ch}
.cta-band p{color:rgba(20,24,29,.82);max-width:56ch;font-weight:500}
.cta-band .wrap{display:flex;gap:30px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band .btn--dark{background:#14181d}

/* ---------- korean block ---------- */
.kr{font-family:"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",var(--font-sans)}
.kr-badge{
  display:inline-flex;align-items:center;gap:9px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);
  border-radius:100px;padding:8px 16px;font-size:.82rem;font-weight:700;color:var(--white);margin-bottom:18px;
}
.kr-badge i{width:8px;height:8px;border-radius:50%;background:var(--ok);display:block}

/* ---------- steps / numbers ---------- */
.numbered{list-style:none;padding:0;counter-reset:n;display:grid;gap:14px}
.numbered li{counter-increment:n;display:flex;gap:16px;margin:0;align-items:flex-start}
.numbered li::before{
  content:counter(n,decimal-leading-zero);font-family:var(--font-mono);font-size:.82rem;font-weight:700;
  color:var(--amber);flex:0 0 34px;padding-top:2px;
}
.numbered li b{display:block;margin-bottom:2px}
.numbered li > span{color:var(--ink-500);font-size:.92rem}
.section--dark .numbered li span,.section--deep .numbered li > span{color:var(--steel-300)}

/* ---------- image placeholder frame ---------- */
.figure{border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(255,255,255,.1);background:var(--ink-700);margin:0}
.figure > svg,.figure > img.photo{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
.figure--tall > img.photo{aspect-ratio:4/3}
.ba-media > img.photo,.ba-after > img.photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-figure{box-shadow:0 34px 74px rgba(0,0,0,.5)}
.figure--tall > svg{aspect-ratio:4/3}
.ind-row{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,56px);align-items:center;padding:clamp(30px,4vw,52px) 0;border-bottom:1px solid var(--concrete-100)}
.ind-row:last-child{border-bottom:0}
.ind-row.flip > .ind-media{order:-1}
@media (max-width:860px){.ind-row{grid-template-columns:1fr}.ind-row.flip > .ind-media{order:0}}
.ind-row ul{columns:2;column-gap:26px;font-size:.93rem;color:var(--ink-500)}
@media (max-width:520px){.ind-row ul{columns:1}}
.figure figcaption{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;color:var(--steel-400);
  padding:11px 14px;border-top:1px solid rgba(255,255,255,.08);
}
.figure--light{border-color:var(--concrete-100);background:var(--concrete-50)}
.figure--light figcaption{border-top-color:var(--concrete-100)}

/* ---------- form block ---------- */
form.form-block{background:var(--white);border:1px solid var(--concrete-100);border-radius:var(--radius-lg);padding:clamp(22px,3.4vw,38px);box-shadow:0 20px 48px rgba(13,17,22,.07)}
.form-steps{display:flex;gap:10px;margin-bottom:26px;flex-wrap:wrap}
.form-steps div{
  flex:1 1 120px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--steel-400);padding-top:11px;border-top:3px solid var(--concrete-100);font-weight:600;
}
.form-steps div.on{color:var(--ink-900);border-top-color:var(--amber)}
.form-steps div.done{color:var(--ok);border-top-color:var(--ok)}
fieldset.fs{border:0;padding:0;margin:0}
fieldset.fs[hidden]{display:none}
fieldset.fs legend{font-weight:800;font-size:1.2rem;margin-bottom:6px;padding:0}
.form-nav{display:flex;gap:12px;justify-content:space-between;margin-top:26px;flex-wrap:wrap}
.form-success{background:rgba(47,158,106,.09);border-left:3px solid var(--ok);padding:24px;border-radius:0 var(--radius) var(--radius) 0}
.form-success h3{color:var(--ok)}
.summary-box{background:var(--concrete-50);border:1px solid var(--concrete-100);border-radius:var(--radius);padding:18px;font-family:var(--font-mono);font-size:.8rem;line-height:1.8;white-space:pre-wrap;word-break:break-word;max-height:280px;overflow:auto;margin-bottom:16px}
.honey{position:absolute;left:-9999px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:var(--steel-300);padding:clamp(46px,6vw,72px) 0 0;font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:clamp(24px,3vw,40px)}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}
.site-footer h4{color:var(--white);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.15em;text-transform:uppercase;margin-bottom:16px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:var(--steel-300);text-decoration:none}
.site-footer a:hover{color:var(--amber-bright)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.09);margin-top:44px;padding:22px 0;font-size:.8rem;color:var(--steel-400);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.foot-note{font-size:.79rem;color:var(--steel-400);line-height:1.6;max-width:46ch}

/* ---------- sticky mobile CTA ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;gap:1px;background:rgba(255,255,255,.12);
  box-shadow:0 -6px 22px rgba(0,0,0,.28);
}
.mobile-bar a{
  flex:1;text-align:center;padding:15px 6px;text-decoration:none;font-weight:700;font-size:.86rem;
  background:var(--ink-900);color:var(--white);
}
.mobile-bar a.primary{background:var(--amber);color:#14181d}
@media (max-width:760px){
  .mobile-bar{display:flex}
  body{padding-bottom:54px}
}

/* ---------- scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .btn:hover,a.card:hover{transform:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* ---------- language wrappers ---------- */
span[data-ko]{font:inherit;color:inherit;letter-spacing:inherit;text-transform:inherit;display:inline}

/* ---------- print ---------- */
@media print{
  .site-header,.mobile-bar,.topbar,.cta-band,.site-footer{display:none}
  body{color:#000}
  .hero,.page-hero,.section--dark,.section--deep{background:#fff !important;color:#000 !important}
  .hero h1,.page-hero h1{color:#000 !important}
}