/* ---------- brandbook ---------- */
.bb{background:#F4F6F8;color:#0A0C0F}
.bb-cover{position:relative;height:100vh;height:100svh;background:#000;color:#fff;overflow:hidden;display:grid;grid-template-rows:1fr auto;padding:calc(var(--hdr) + 40px) var(--gut) 40px}
.bb-cover .mark{align-self:center;justify-self:center;width:min(58vw,520px)}
.bb-cover .mark svg{width:100%;height:auto}
.bb-cover .mark .ink{fill:#fff;clip-path:inset(0 0 100% 0);animation:bbInk 1.6s var(--ease) .4s forwards}
.bb-cover .mark .accent{transform:scaleX(0);transform-origin:left;transform-box:fill-box;animation:bbDash .9s var(--ease) 1.6s forwards}
@keyframes bbInk{to{clip-path:inset(0 0 0 0)}}
@keyframes bbDash{to{transform:scaleX(1)}}
.bb-cover .meta{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;border-top:1px solid rgba(255,255,255,.18);padding-top:24px}
.bb-cover .meta h1{font:300 clamp(30px,4vw,64px)/1 var(--display);letter-spacing:-.03em;margin:0}
.bb-cover .meta p{margin:0;color:var(--muted);font-size:14px;text-align:right}
.bb-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:calc(100%/12) 80px;pointer-events:none}

.bb-wrap{display:grid;grid-template-columns:240px 1fr;gap:0}
.bb-index{position:sticky;top:0;align-self:start;height:100vh;padding:calc(var(--hdr) + 50px) 0 40px var(--gut);border-right:1px solid #D9DEE3;overflow:auto}
.bb-index a{display:flex;gap:12px;padding:7px 0;font-size:13px;color:#6B737C;transition:color .3s}
.bb-index a b{font-weight:500;color:#A2A9B1;min-width:22px;font-size:11px;padding-top:2px}
.bb-index a:hover,.bb-index a.on{color:#0A0C0F}
.bb-index a.on b{color:var(--blue)}
.bb-main{min-width:0}
.bb-ch{padding:clamp(80px,12vh,140px) var(--gut);border-bottom:1px solid #D9DEE3}
.bb-ch.dark{background:#050607;color:#F2F4F6;border-bottom-color:#1A1E23}
.bb-ch-head{display:grid;grid-template-columns:120px 1fr;gap:30px;margin-bottom:56px}
.bb-ch-head .no{font:300 64px/1 var(--display);letter-spacing:-.05em;color:var(--blue)}
.bb-ch-head h2{font:300 clamp(32px,4vw,64px)/1.02 var(--display);letter-spacing:-.03em;margin:0}
.bb-ch-head p{margin:18px 0 0;max-width:62ch;color:#4A525B;font-size:17px}
.bb-ch.dark .bb-ch-head p{color:#A9B0B8}
.bb-h3{font:500 12px var(--text);letter-spacing:.2em;text-transform:uppercase;color:#6B737C;margin:56px 0 20px;display:flex;align-items:center;gap:12px}
.bb-h3::before{content:"";width:22px;height:5px;background:var(--blue)}

.tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.tiles.t3{grid-template-columns:repeat(3,1fr)}
.tiles.t4{grid-template-columns:repeat(4,1fr)}
.tile{position:relative;border-radius:4px;min-height:280px;display:grid;place-items:center;padding:40px;overflow:hidden}
.tile svg{width:100%;height:auto;max-width:520px}
.tile.sq svg{max-width:180px}
.tile .cap{position:absolute;left:18px;bottom:14px;font:500 11px var(--text);letter-spacing:.16em;text-transform:uppercase;opacity:.6}
.t-white{background:#fff;border:1px solid #E1E5E9}.t-black{background:#000;color:#fff}.t-graph{background:#14171B;color:#fff}.t-blue{background:var(--blue);color:#fff}.t-mist{background:#E9EDF1}
.t-photo{background:#000 center/cover no-repeat;color:#fff}
.t-photo::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,.35)}
.t-photo svg{position:relative}

.note{font-size:14px;color:#59616B;max-width:64ch}
.bb-ch.dark .note{color:#9AA2AA}
.rules{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid #D9DEE3;margin-top:30px}
.rules div{padding:22px 24px 22px 0;border-bottom:1px solid #D9DEE3;font-size:15px}
.rules b{display:block;font:500 13px var(--text);letter-spacing:.04em;margin-bottom:6px}
.bb-ch.dark .rules,.bb-ch.dark .rules div{border-color:#22272D}

/* construction */
.constr{position:relative;background:#fff;border:1px solid #E1E5E9;border-radius:4px;padding:clamp(40px,8vw,120px)}
.constr .lg{position:relative}
.constr .lg svg{width:100%;height:auto}
.constr .guide{position:absolute;pointer-events:none}
.constr .g-h{left:-20%;right:-20%;height:0;border-top:1px dashed rgba(62,142,203,.8)}
.constr .g-v{top:-30%;bottom:-30%;width:0;border-left:1px dashed rgba(62,142,203,.8)}
.constr .zone{position:absolute;inset:0;margin:calc(-1 * var(--cz));border:1px solid rgba(62,142,203,.5);background:repeating-linear-gradient(45deg,rgba(62,142,203,.07) 0 6px,transparent 6px 12px)}
.constr .zone::after{content:"";position:absolute;inset:var(--cz);background:#fff}
.constr .lbl{position:absolute;font:600 11px var(--text);color:var(--blue);letter-spacing:.1em}
.minsz{display:flex;gap:50px;align-items:flex-end;flex-wrap:wrap;background:#fff;border:1px solid #E1E5E9;border-radius:4px;padding:40px}
.minsz figure{margin:0}
.minsz figcaption{font-size:12px;color:#6B737C;margin-top:12px;letter-spacing:.06em}

/* misuse */
.bad{position:relative;background:#fff;border:1px solid #E1E5E9;border-radius:4px;min-height:200px;display:grid;place-items:center;padding:30px;overflow:hidden}
.bad svg{width:80%;height:auto}
.bad::before,.bad::after{content:"";position:absolute;right:16px;top:16px;width:18px;height:2px;background:#E5484D;transform:rotate(45deg)}
.bad::after{transform:rotate(-45deg)}
.bad span{position:absolute;left:16px;bottom:12px;font-size:12px;color:#6B737C}

/* colors */
.swatches{display:grid;grid-template-columns:2fr 2fr 1fr 1fr 1fr;gap:12px}
.sw{border-radius:4px;min-height:340px;padding:22px;display:flex;flex-direction:column;justify-content:space-between;font-size:13px}
.sw h4{font:400 22px/1.1 var(--display);margin:0;letter-spacing:-.01em}
.sw dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-variant-numeric:tabular-nums}
.sw dt{opacity:.6}.sw dd{margin:0}
.ratio{display:flex;height:56px;border-radius:4px;overflow:hidden;margin-top:24px}
.ratio i{display:grid;place-items:center;font:600 11px var(--text);letter-spacing:.1em;font-style:normal}

/* type */
.spec{border-top:1px solid #D9DEE3;padding:40px 0;display:grid;grid-template-columns:260px 1fr;gap:40px}
.spec .name{font:500 13px var(--text);letter-spacing:.06em}
.spec .name small{display:block;color:#6B737C;font-weight:400;margin-top:8px;line-height:1.6}
.spec .glyphs{font-size:clamp(40px,6vw,96px);line-height:1.05;letter-spacing:-.03em;word-break:break-word}
.scale{display:grid;gap:0;border-top:1px solid #D9DEE3}
.scale div{display:grid;grid-template-columns:160px 1fr;gap:30px;align-items:baseline;padding:20px 0;border-bottom:1px solid #D9DEE3}
.scale small{font-size:12px;color:#6B737C;letter-spacing:.04em}

/* impulse */
.imp-demo{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.imp-card{background:#050607;color:#fff;border-radius:4px;min-height:260px;padding:28px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;position:relative}
.imp-card .dash{width:46px;height:10px;background:var(--blue)}
.imp-pattern{position:absolute;inset:0;display:grid;grid-template-columns:repeat(12,1fr);gap:18px 14px;padding:24px;align-content:center;opacity:.9}
.imp-pattern i{height:6px;background:#22272D}
.imp-pattern i.b{background:var(--blue)}
.imp-load{height:10px;background:#1A1E23;position:relative;overflow:hidden}
.imp-load::after{content:"";position:absolute;left:0;top:0;bottom:0;width:30%;background:var(--blue);animation:impLoad 2.4s var(--ease-io) infinite}
@keyframes impLoad{0%{left:-30%}100%{left:100%}}

/* photo */
.photo-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:12px}
.photo-grid figure{margin:0;border-radius:4px;overflow:hidden;position:relative}
.photo-grid figure.w2{grid-column:span 2}.photo-grid figure.h2{grid-row:span 2}
.photo-grid img{width:100%;height:100%;object-fit:cover;transition:transform 1.4s var(--ease)}
.photo-grid figure:hover img{transform:scale(1.05)}

/* mockups */
.mock{position:relative;border-radius:4px;overflow:hidden;background:#111}
.mock>img{width:100%;height:auto;display:block}
.mock .ov{position:absolute;display:grid;place-items:center}
.mock .ov svg{width:100%;height:auto}
.mock .ov.persp{transform-origin:center}
.mock figcaption,.mock .mcap{position:absolute;left:16px;bottom:14px;font:500 11px var(--text);letter-spacing:.16em;text-transform:uppercase;color:#fff;background:rgba(0,0,0,.45);padding:6px 10px;border-radius:30px;backdrop-filter:blur(6px)}
.mocks{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.mocks .full{grid-column:1/-1}

/* flat print layouts */
.cards-flat{display:flex;gap:30px;flex-wrap:wrap;align-items:flex-start}
.bcard{width:340px;aspect-ratio:90/50;border-radius:6px;box-shadow:0 30px 60px -30px rgba(10,12,15,.35);position:relative;overflow:hidden;padding:22px 24px;display:flex;flex-direction:column;justify-content:space-between}
.bcard.f{background:#050607;color:#fff}
.bcard.b{background:#fff;color:#0A0C0F}
.bcard .nm{font:400 16px/1.2 var(--display);letter-spacing:-.01em}
.bcard .rl{font-size:10.5px;color:#6B737C;margin-top:4px;letter-spacing:.04em}
.bcard .ct{font-size:10px;line-height:1.6;color:#3B424A}
.bcard .strip{position:absolute;right:0;bottom:0;width:38%;height:6px;background:var(--blue)}
.letter{width:min(100%,520px);aspect-ratio:210/297;background:#fff;box-shadow:0 30px 60px -30px rgba(10,12,15,.35);padding:7% 8%;display:flex;flex-direction:column;font-size:9px;color:#3B424A;position:relative}
.letter .top{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:1px solid #E1E5E9;padding-bottom:16px}
.letter .lines i{display:block;height:5px;background:#EDF0F3;margin:9px 0;border-radius:2px}
.letter .foot{margin-top:auto;display:flex;justify-content:space-between;border-top:1px solid #E1E5E9;padding-top:12px;font-size:7.5px;color:#6B737C}
.letter .acc{position:absolute;left:0;top:0;width:6px;height:18%;background:var(--blue)}

/* digital */
.dig{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:start}
.ava{aspect-ratio:1;border-radius:50%;background:#000;display:grid;place-items:center;padding:24%}
.post{aspect-ratio:1;border-radius:4px;background:#000 center/cover;position:relative;overflow:hidden;color:#fff;padding:8%;display:flex;flex-direction:column;justify-content:space-between}
.post::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.3),rgba(0,0,0,.05) 40%,rgba(0,0,0,.75))}
.post>*{position:relative}
.post h5{font:300 clamp(16px,1.6vw,24px)/1.1 var(--display);margin:0;letter-spacing:-.02em}
.story{aspect-ratio:9/16;border-radius:14px;background:#000 center/cover;position:relative;overflow:hidden;color:#fff;padding:10% 9%;display:flex;flex-direction:column;justify-content:space-between}
.story::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.35),rgba(0,0,0,0) 35%,rgba(0,0,0,.8))}
.story>*{position:relative}
.banner-h{grid-column:1/-1;height:110px;border-radius:4px;background:#050607;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 30px;gap:30px;overflow:hidden;position:relative}
.banner-h .bg{position:absolute;inset:0;background:center/cover;opacity:.55}
.banner-h>*:not(.bg){position:relative}
.sig{background:#fff;border:1px solid #E1E5E9;border-radius:4px;padding:26px;font-size:13px;color:#3B424A;grid-column:span 2}
.sig .n{font:400 17px var(--display);color:#0A0C0F}
.slide{grid-column:span 2;aspect-ratio:16/9;border-radius:4px;background:#000 center/cover;position:relative;overflow:hidden;color:#fff;padding:5%;display:flex;flex-direction:column;justify-content:space-between}
.slide::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.85),rgba(0,0,0,.1))}
.slide>*{position:relative}

/* tone */
.tone{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.tone div{border-radius:4px;padding:28px}
.tone .yes{background:#fff;border:1px solid #E1E5E9;color:#0A0C0F}
.tone .no{background:#ECEFF2;color:#59616B}
.tone h4{font:600 12px var(--text);letter-spacing:.16em;text-transform:uppercase;margin:0 0 16px}
.tone .yes h4{color:var(--blue)}
.tone p{margin:0 0 12px;font:400 17px/1.4 var(--display);letter-spacing:-.005em}
.tone .no p{text-decoration:line-through;text-decoration-color:rgba(229,72,77,.6)}

.dl{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.dl a{display:flex;justify-content:space-between;align-items:center;gap:12px;background:#fff;border:1px solid #E1E5E9;border-radius:4px;padding:18px 20px;font-size:14px;transition:.3s}
.dl a:hover{border-color:var(--blue);color:var(--blue)}
.dl a small{color:#8A929C;font-size:11px;letter-spacing:.1em}

@media (max-width:1100px){
  .bb-wrap{grid-template-columns:1fr}
  .bb-index{display:none}
  .swatches{grid-template-columns:1fr 1fr}
  .dig{grid-template-columns:1fr 1fr}
  .dl{grid-template-columns:1fr 1fr}
  .photo-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .bb-ch-head{grid-template-columns:1fr;gap:10px}
  .tiles,.tiles.t3,.tiles.t4,.imp-demo,.mocks,.tone,.rules{grid-template-columns:1fr}
  .swatches{grid-template-columns:1fr}
  .sw{min-height:200px}
  .spec,.scale div{grid-template-columns:1fr;gap:12px}
  .dig{grid-template-columns:1fr 1fr}
  .sig,.slide{grid-column:1/-1}
  .bb-cover .meta{flex-direction:column;align-items:flex-start}
  .bb-cover .meta p{text-align:left}
  .bcard{width:100%}
}