/* =========================================================================
   2026 DGIST AI Build Week — Event Identity System
   Mood: Grid-clean / Swiss-academic · DGIST Blue · Sovereign-AI motif
   ========================================================================= */

/* ---- Fonts ---- */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* DGIST Blue family */
  --blue:        #1538C9;   /* primary — DGIST royal blue */
  --blue-bright: #3B6BFF;   /* energetic accent / glow      */
  --blue-deep:   #0B1F6B;   /* deep navy blue               */
  --ink:         #0A1330;   /* near-black navy (text)       */
  --ink-2:       #2A3354;

  --paper:   #FFFFFF;
  --paper-2: #F3F5FA;       /* tinted panel                 */
  --line:    #D8DEEC;       /* hairline / grid              */
  --line-2:  #E8ECF5;
  --mute:    #6B7493;       /* muted label gray-blue        */

  /* Board (gallery wall) */
  --board:   #E7E9EF;
  --board-2: #DDE0E8;

  --sans: 'Pretendard', system-ui, sans-serif;
  --disp: 'Space Grotesk', 'Pretendard', sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  --r: 3px;
}

*{ box-sizing:border-box; }
html{ -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility; }
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--board);
  background-image:
    linear-gradient(var(--board-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--board-2) 1px, transparent 1px);
  background-size:32px 32px;
}

/* =========================================================================
   BOARD LAYOUT
   ========================================================================= */
.board{ max-width:1180px; margin:0 auto; padding:64px 40px 120px; }

.board-head{ margin-bottom:56px; }
.kicker{
  font-family:var(--mono); font-size:12px; letter-spacing:.18em;
  text-transform:uppercase; color:var(--blue);
  display:flex; align-items:center; gap:10px; margin-bottom:18px;
}
.kicker::before{ content:""; width:26px; height:2px; background:var(--blue); display:inline-block; }
.board-head h1{
  font-family:var(--disp); font-weight:600; letter-spacing:-.02em;
  font-size:40px; line-height:1.05; margin:0 0 14px;
}
.board-head p{ max-width:62ch; color:var(--ink-2); font-size:15px; line-height:1.65; margin:0; }

/* section wrapper for each deliverable */
.piece{ margin-top:72px; }
.piece-tag{
  display:flex; align-items:baseline; gap:14px;
  font-family:var(--mono); font-size:12.5px; letter-spacing:.06em;
  text-transform:uppercase; color:var(--ink); margin-bottom:18px;
  border-bottom:1px solid var(--board-2); padding-bottom:12px;
}
.piece-tag .num{ color:var(--blue); font-weight:600; }
.piece-tag .dim{ color:var(--mute); margin-left:auto; letter-spacing:.04em; text-transform:none; }
.piece-note{ font-size:13.5px; color:var(--ink-2); line-height:1.6; margin:16px 2px 0; max-width:72ch; }
.piece-note strong{ color:var(--ink); font-weight:600; }

/* white artifact card on the gallery wall */
.card{
  background:var(--paper);
  border:1px solid var(--line-2);
  border-radius:var(--r);
  box-shadow:0 1px 0 rgba(10,19,48,.03), 0 22px 50px -28px rgba(10,19,48,.30);
}
.row{ display:flex; gap:24px; flex-wrap:wrap; }

/* =========================================================================
   THE MARK  (modular grid + node network = build × sovereign AI)
   ========================================================================= */
/* grid texture for dark fields */
.grid-bg{
  background-image:
    linear-gradient(rgba(120,160,255,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,160,255,.09) 1px, transparent 1px);
  background-size:34px 34px;
}

.mark{ display:block; }
.mark .dot{ fill:var(--line); }
.mark .cell{ fill:var(--blue); }
.mark .cell.bright{ fill:var(--blue-bright); }
.mark .link{ stroke:var(--blue); stroke-width:2.4; }
.mark .node{ fill:var(--paper); stroke:var(--blue); stroke-width:2.4; }
.mark .node.fill{ fill:var(--blue); }
.mark.on-ink .dot{ fill:rgba(255,255,255,.16); }
.mark.on-ink .node{ fill:var(--ink); stroke:var(--blue-bright); }
.mark.on-ink .link{ stroke:var(--blue-bright); }
.mark.on-ink .cell{ fill:var(--blue-bright); }
.mark.on-ink .cell.bright{ fill:#9DB8FF; }

/* logo lockup */
.lockup{ display:flex; align-items:center; gap:18px; }
.lockup .mark{ flex:none; }
.lk-type{ line-height:1; }
.lk-year{
  font-family:var(--mono); font-size:11px; letter-spacing:.34em;
  color:var(--blue); display:block; margin-bottom:7px;
}
.lk-name{
  font-family:var(--disp); font-weight:600; letter-spacing:-.02em;
  font-size:23px; line-height:1.05; color:var(--ink); display:block; white-space:nowrap;
}
.lk-name b{ color:var(--blue); font-weight:600; }
.lk-sub{
  font-family:var(--mono); font-size:10px; letter-spacing:.22em;
  color:var(--mute); display:block; margin-top:8px; text-transform:uppercase;
}
.lockup.on-ink .lk-name{ color:#fff; }
.lockup.on-ink .lk-name b{ color:var(--blue-bright); }
.lockup.on-ink .lk-year{ color:var(--blue-bright); }
.lockup.on-ink .lk-sub{ color:rgba(255,255,255,.5); }

/* mono utility label / chip */
.chip{
  font-family:var(--mono); font-size:11px; letter-spacing:.08em;
  text-transform:uppercase; color:var(--blue);
  border:1px solid var(--line); border-radius:999px; padding:5px 11px;
  display:inline-flex; align-items:center; gap:7px; background:var(--paper);
}
.chip .sq{ width:7px; height:7px; background:var(--blue); }

/* =========================================================================
   HERO / KEY VISUAL  (ink-navy field with module grid + network)
   ========================================================================= */
.hero{
  position:relative; overflow:hidden; color:#fff;
  background:
    radial-gradient(120% 90% at 78% 8%, #16276e 0%, transparent 55%),
    linear-gradient(160deg, #0c1842 0%, #0a1330 60%, #070d24 100%);
  border-radius:var(--r); border:1px solid #1a274f;
  aspect-ratio:5/3; padding:54px 56px; display:flex; flex-direction:column; justify-content:space-between;
}
.hero .grid-bg{ position:absolute; inset:0; opacity:.9; }
.hero .glow{
  position:absolute; width:520px; height:520px; right:-90px; top:-150px;
  background:radial-gradient(circle, rgba(59,107,255,.42), transparent 62%);
  pointer-events:none;
}
.hero-top{ position:relative; display:flex; justify-content:space-between; align-items:flex-start; gap:20px; }
.hero-top .lockup{ flex:none; }
.hero-mid{ position:relative; }
.hero-eyebrow{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.26em;
  text-transform:uppercase; color:var(--blue-bright); margin-bottom:18px;
  display:flex; align-items:center; gap:12px;
}
.hero-eyebrow::before{ content:""; width:34px; height:1.5px; background:var(--blue-bright); }
.hero h2{
  font-family:var(--disp); font-weight:600; letter-spacing:-.028em;
  font-size:clamp(34px,4.7vw,58px); line-height:1.0; margin:0;
}
.hero h2 .kr{ font-family:var(--sans); font-weight:600; }
.hero h2 em{ font-style:normal; color:var(--blue-bright); }
.hero-meta{
  position:relative; display:flex; gap:40px; margin-top:30px;
  font-family:var(--mono); font-size:13px; color:rgba(255,255,255,.74);
  border-top:1px solid rgba(255,255,255,.14); padding-top:20px; flex-wrap:wrap;
}
.hero-meta > div{ min-width:130px; }
.hero-meta b{ color:#fff; font-weight:500; display:block; margin:4px 0 2px; font-size:15px; letter-spacing:0; white-space:nowrap; }
.hero-meta .lbl{ letter-spacing:.16em; text-transform:uppercase; font-size:10.5px; color:var(--blue-bright); }

/* =========================================================================
   COLOR + TYPE
   ========================================================================= */
.sys-grid{ display:grid; grid-template-columns:1.1fr 1fr; gap:24px; }
.panel{ background:var(--paper); border:1px solid var(--line-2); border-radius:var(--r); padding:28px 30px; }
.panel h3{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--mute); margin:0 0 20px; font-weight:500;
}
.swatches{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; border:1px solid var(--line-2); border-radius:var(--r); overflow:hidden; }
.sw{ padding:18px 14px 14px; min-height:118px; display:flex; flex-direction:column; justify-content:flex-end; border-right:1px solid rgba(255,255,255,.14); }
.sw:last-child{ border-right:none; }
.sw .hex{ font-family:var(--mono); font-size:11px; letter-spacing:.04em; }
.sw .nm{ font-size:12px; margin-top:3px; font-weight:500; }
.sw.dark .nm, .sw.dark .hex{ color:#fff; }
.sw.light .nm{ color:var(--ink); } .sw.light .hex{ color:var(--mute); }

.type-row{ border-top:1px solid var(--line-2); padding:16px 0; display:flex; align-items:baseline; gap:18px; }
.type-row:first-of-type{ border-top:none; }
.type-row .meta{ font-family:var(--mono); font-size:10.5px; color:var(--mute); width:96px; flex:none; letter-spacing:.04em; }
.type-row .spec{ font-family:var(--disp); color:var(--ink); }

/* =========================================================================
   POSTER
   ========================================================================= */
.poster{
  width:460px; aspect-ratio:420/594; position:relative; overflow:hidden;
  background:linear-gradient(165deg,#0c1842 0%, #0a1330 58%, #070d24 100%);
  color:#fff; padding:40px 38px; display:flex; flex-direction:column;
  border-radius:var(--r);
}
.poster .grid-bg{ position:absolute; inset:0; }
.poster .glow{ position:absolute; width:360px; height:360px; right:-110px; top:34%;
  background:radial-gradient(circle, rgba(59,107,255,.40), transparent 62%); }
.poster-top{ position:relative; display:flex; justify-content:space-between; align-items:flex-start; }
.poster-hero{ position:relative; margin-top:44px; }
.poster-hero .tag{
  font-family:var(--mono); font-size:11px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--blue-bright); margin-bottom:14px;
}
.poster-hero h2{
  font-family:var(--disp); font-weight:600; font-size:50px; line-height:.95;
  letter-spacing:-.03em; margin:0;
}
.poster-hero h2 em{ font-style:normal; color:var(--blue-bright); }
.poster-hero .kr{ font-family:var(--sans); font-size:16px; color:rgba(255,255,255,.72);
  margin-top:16px; line-height:1.5; font-weight:400; }
.poster-mid{ position:relative; margin-top:26px; }
.poster-info{ position:relative; margin-top:auto; border-top:1px solid rgba(255,255,255,.16); padding-top:18px; }
.pi-row{ display:flex; gap:10px; font-family:var(--mono); font-size:11.5px; color:rgba(255,255,255,.8); margin-bottom:7px; }
.pi-row .k{ color:var(--blue-bright); width:54px; flex:none; letter-spacing:.1em; }
.poster-partners{ position:relative; margin-top:20px; display:flex; align-items:center; gap:14px; flex-wrap:wrap; }
.poster-partners .pl{ font-family:var(--mono); font-size:10px; letter-spacing:.14em; color:rgba(255,255,255,.4); text-transform:uppercase; }

/* partner logos */
.plogo{ width:auto; display:block; }
.partner-row{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; }

/* placeholder for real logos */
.logo-ph{
  border:1px dashed rgba(255,255,255,.28); border-radius:2px; padding:7px 12px;
  font-family:var(--mono); font-size:11px; letter-spacing:.08em; color:rgba(255,255,255,.62);
  background:repeating-linear-gradient(135deg, rgba(255,255,255,.04) 0 6px, transparent 6px 12px);
}
.logo-ph.dark{ border-color:var(--line); color:var(--mute);
  background:repeating-linear-gradient(135deg, rgba(10,19,48,.03) 0 6px, transparent 6px 12px); }

/* =========================================================================
   X-BANNERS  (standing 600×1800)
   ========================================================================= */
.xb{ width:172px; aspect-ratio:600/1800; border-radius:var(--r); overflow:hidden;
  position:relative; display:flex; flex-direction:column; padding:24px 20px; color:#fff; }
.xb.dark{ background:linear-gradient(180deg,#0c1842,#070d24); }
.xb.lite{ background:var(--paper); color:var(--ink); border:1px solid var(--line); }
.xb .grid-bg{ position:absolute; inset:0; }
.xb-top{ position:relative; }
.xb-fn{ position:relative; margin-top:auto; }
.xb .big{ font-family:var(--disp); font-weight:600; font-size:27px; line-height:1; letter-spacing:-.02em; }
.xb .big em{ font-style:normal; color:var(--blue-bright); }
.xb.lite .big em{ color:var(--blue); }
.xb .kr{ font-size:13px; margin-top:10px; line-height:1.45; }
.xb.dark .kr{ color:rgba(255,255,255,.72); } .xb.lite .kr{ color:var(--ink-2); }
.xb .xtag{ font-family:var(--mono); font-size:9.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--blue-bright); margin-bottom:14px; }
.xb.lite .xtag{ color:var(--blue); }
.xb-arrow{ font-family:var(--disp); font-size:40px; line-height:1; margin-top:14px; }

/* =========================================================================
   현수막  (horizontal banner)
   ========================================================================= */
.banner{ width:100%; aspect-ratio:5/1; border-radius:var(--r); overflow:hidden; position:relative;
  background:linear-gradient(110deg,#0c1842,#0a1330 55%,#070d24); color:#fff;
  display:flex; align-items:center; padding:0 48px; gap:40px; }
.banner .grid-bg{ position:absolute; inset:0; }
.banner .glow{ position:absolute; width:340px; height:340px; right:8%; top:-120%;
  background:radial-gradient(circle, rgba(59,107,255,.4), transparent 62%); }
.banner .b-main{ position:relative; }
.banner .b-main h2{ font-family:var(--disp); font-weight:600; font-size:38px; letter-spacing:-.02em; margin:0; line-height:1; }
.banner .b-main h2 em{ font-style:normal; color:var(--blue-bright); }
.banner .b-main .kr{ font-family:var(--mono); font-size:12px; color:rgba(255,255,255,.66); margin-top:10px; letter-spacing:.04em; }
.banner .b-meta{ position:relative; margin-left:auto; text-align:right; font-family:var(--mono);
  font-size:12px; color:rgba(255,255,255,.8); line-height:1.7; }
.banner .b-meta .blue{ color:var(--blue-bright); }

/* =========================================================================
   NAME BADGE + STICKERS
   ========================================================================= */
.badge{ width:212px; aspect-ratio:90/128; border-radius:8px; overflow:hidden; position:relative;
  background:var(--paper); border:1px solid var(--line); display:flex; flex-direction:column; }
.badge-hole{ width:42px; height:9px; border-radius:999px; background:var(--paper-2);
  border:1px solid var(--line); margin:12px auto 0; }
.badge-head{ background:linear-gradient(160deg,#0c1842,#0a1330); color:#fff; padding:16px 18px 14px;
  margin-top:12px; position:relative; overflow:hidden; }
.badge-head .grid-bg{ position:absolute; inset:0; }
.badge-head .bt{ font-family:var(--mono); font-size:8.5px; letter-spacing:.16em; color:var(--blue-bright); position:relative; }
.badge-head .bn{ font-family:var(--disp); font-weight:600; font-size:16px; position:relative; margin-top:4px; letter-spacing:-.01em; }
.badge-body{ padding:16px 18px; display:flex; flex-direction:column; flex:1; }
.badge-name{ font-size:22px; font-weight:700; letter-spacing:-.01em; }
.badge-role{ font-family:var(--mono); font-size:10.5px; color:var(--mute); margin-top:5px; letter-spacing:.04em; }
.badge-stub{ margin-top:auto; }
.badge-stub .sl{ font-family:var(--mono); font-size:8.5px; letter-spacing:.12em; color:var(--mute); text-transform:uppercase; margin-bottom:7px; }
.stub-slots{ display:grid; grid-template-columns:repeat(5,1fr); gap:5px; }
.stub-slots .slot{ aspect-ratio:1; border:1px dashed var(--line); border-radius:999px; }
.stub-slots .slot.done{ border:none; background:var(--blue); }
.stub-slots .slot.done.b{ background:var(--blue-bright); }

.sticker-sheet{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.sticker{ aspect-ratio:1; border-radius:999px; display:flex; flex-direction:column;
  align-items:center; justify-content:center; text-align:center; position:relative; overflow:hidden; }
.sticker.fill{ background:linear-gradient(160deg,#1c44d6,#1230a6); color:#fff; }
.sticker.line{ background:var(--paper); border:2px solid var(--blue); color:var(--blue); }
.sticker.bright{ background:linear-gradient(160deg,#4a78ff,#2e5bff); color:#fff; }
.sticker .si{ font-family:var(--disp); font-weight:700; font-size:26px; line-height:1; }
.sticker .ss{ font-family:var(--mono); font-size:8.5px; letter-spacing:.08em; margin-top:6px; opacity:.85; padding:0 10px; }
.sticker .sc{ position:absolute; inset:0; }

/* =========================================================================
   CERTIFICATE
   ========================================================================= */
.cert{ width:100%; max-width:760px; aspect-ratio:297/210; position:relative; overflow:hidden;
  background:var(--paper); border:1px solid var(--line); border-radius:var(--r);
  padding:44px 52px; display:flex; flex-direction:column; }
.cert .corner{ position:absolute; width:64px; height:64px; }
.cert .corner.tr{ right:0; top:0; border-top:3px solid var(--blue); border-right:3px solid var(--blue); }
.cert .corner.bl{ left:0; bottom:0; border-bottom:3px solid var(--blue); border-left:3px solid var(--blue); }
.cert-watermark{ position:absolute; right:-40px; bottom:-60px; width:340px; opacity:.05; }
.cert-top{ display:flex; justify-content:space-between; align-items:flex-start; position:relative; }
.cert-title{ font-family:var(--mono); font-size:12px; letter-spacing:.32em; color:var(--blue); text-transform:uppercase; }
.cert-mid{ position:relative; margin-top:auto; }
.cert h2{ font-family:var(--disp); font-weight:600; font-size:34px; letter-spacing:-.01em; margin:0 0 6px; }
.cert .recipient{ font-size:28px; font-weight:700; margin:18px 0 6px; }
.cert .recipient .u{ border-bottom:2px solid var(--blue); padding:0 26px 4px; }
.cert .body{ font-size:13.5px; color:var(--ink-2); line-height:1.7; max-width:60ch; margin-top:12px; }
.cert-foot{ position:relative; display:flex; justify-content:space-between; align-items:flex-end; margin-top:30px; padding-top:18px; border-top:1px solid var(--line-2); }
.cert-foot .sig{ font-family:var(--mono); font-size:11px; color:var(--mute); line-height:1.7; }
.cert-foot .sig b{ color:var(--ink); font-weight:600; display:block; font-size:13px; }
.cert-seal{ width:74px; height:74px; border-radius:999px; border:2px solid var(--blue);
  display:flex; align-items:center; justify-content:center; position:relative; }

/* =========================================================================
   PHOTOZONE
   ========================================================================= */
.photozone{ width:100%; aspect-ratio:16/9; border-radius:var(--r); overflow:hidden; position:relative;
  background:linear-gradient(155deg,#0c1842,#0a1330 60%,#070d24); color:#fff;
  display:flex; flex-direction:column; align-items:center; justify-content:center; padding:40px; }
.photozone .grid-bg{ position:absolute; inset:0; }
.photozone .glow{ position:absolute; width:560px; height:560px; left:50%; top:30%; transform:translate(-50%,-50%);
  background:radial-gradient(circle, rgba(59,107,255,.32), transparent 60%); }
.photozone .pz-logo{ position:relative; text-align:center; }
.photozone .pz-hash{ position:relative; font-family:var(--mono); font-size:15px; letter-spacing:.18em;
  color:var(--blue-bright); margin-top:24px; }
.photozone .pz-side{ position:absolute; font-family:var(--mono); font-size:11px; letter-spacing:.16em;
  color:rgba(255,255,255,.4); text-transform:uppercase; }

/* misc */
.legend{ display:flex; gap:22px; flex-wrap:wrap; margin-top:18px; }
.legend .lg{ display:flex; gap:9px; align-items:flex-start; font-size:12.5px; color:var(--ink-2); line-height:1.5; max-width:30ch; }
.legend .lg .d{ width:11px; height:11px; flex:none; margin-top:3px; border-radius:2px; }

footer.board-foot{ margin-top:90px; border-top:1px solid var(--board-2); padding-top:28px;
  font-family:var(--mono); font-size:12px; color:var(--mute); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; }

@media(max-width:880px){
  .sys-grid{ grid-template-columns:1fr; }
  .board{ padding:40px 20px 90px; }
  .hero{ aspect-ratio:auto; min-height:460px; }
}