/* 글 첫 칸 — 10/17 확정(3차, 논문 4차). 회색 판·검정 표시창·주황 강조·초록 확인. 한글 작은 글씨는 고정폭 글꼴을 쓰지 않는다. */
.tf-panel{--tf-disp:#14171a;--tf-dline:#2b3035;--tf-dtext:#aab2b9;--tf-mark:#ff5a1f;--tf-ok:#1aa868;--tf-amber:#ffb224;--tf-ink:#0f1113;--tf-mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
 max-width:980px;margin:22px 0 8px;border-radius:18px;overflow:hidden;position:relative;font-variant-numeric:tabular-nums;letter-spacing:-.016em}
.tf-panel h3,.tf-panel h4,.tf-panel p{margin:0}
.tf-chips{display:flex;flex-wrap:wrap;gap:7px}.tf-chips b{border:1px solid #ffffff40;border-radius:999px;padding:3px 11px;font-size:13.5px;font-weight:700;color:#fff;background:#ffffff0d}
.tf-lamp{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;white-space:nowrap;color:inherit;text-decoration:none}
.tf-lamp:hover span{text-decoration:underline;text-underline-offset:3px}
.tf-lamp i{width:7px;height:7px;border-radius:50%;flex:none}
.tf-lamp.ok i{background:var(--tf-ok);box-shadow:0 0 0 3px #1aa86826}.tf-lamp.wait i{background:var(--tf-amber)}.tf-lamp.none i{border:1.5px solid currentColor;opacity:.7}
.tf-lamp em{font:500 12px var(--tf-mono);font-style:normal;opacity:.85}
.tf-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 32px}
.tf-tag{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700}
.tf-t{background:var(--tf-mark);color:#fff;border-radius:5px;padding:2px 8px;font-size:12px}
.tf-env{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:baseline;padding:16px 32px;font-size:14px;line-height:1.55}
.tf-env>span{font-size:12.5px;font-weight:700;opacity:.72}
.tf-env a{font-size:13px;font-weight:600;color:inherit;opacity:.8;text-decoration:none;white-space:nowrap}
.tf-env a:hover{opacity:1;text-decoration:underline;text-underline-offset:3px}
.tf-path{display:flex;flex-wrap:wrap;align-items:center;row-gap:10px;list-style:none;margin:0;padding:0;counter-reset:p}
.tf-path li{display:flex;align-items:center;font-weight:700;font-size:15px;counter-increment:p;margin:0}
.tf-path li+li::before{content:"";width:30px;height:1.5px;background:currentColor;opacity:.32;margin:0 10px}
.tf-path li span{border:1px solid #ffffff38;border-radius:8px;padding:7px 13px;line-height:1.3}
.tf-path li:last-child span{background:#fff;color:var(--tf-ink);border-color:#fff}
/* 사용법 */
.tf-howto,.tf-fix{background:var(--tf-disp);color:#fff;border:5px solid #0c0e10}
.tf-howto .tf-bar,.tf-fix .tf-bar{border-bottom:1px solid var(--tf-dline);color:#d7dde2}
.tf-one{padding:36px 36px 30px}
.tf-q{font-size:13.5px;font-weight:600;color:var(--tf-dtext);margin:0 0 12px!important}
.tf-ans{font-size:34px;line-height:1.2;font-weight:800;letter-spacing:-.04em;margin:0 0 26px!important}
.tf-ans.is-long{font-size:22px;line-height:1.5;letter-spacing:-.03em;max-width:820px}
.tf-ans small{font-size:18px;color:var(--tf-dtext);font-weight:600;margin-left:8px;letter-spacing:-.01em}
.tf-detail{display:inline-block;margin-top:22px;font-size:13px;font-weight:600;color:#d7dde2;text-decoration:none}.tf-detail:hover{text-decoration:underline}
.tf-many{padding:22px 28px}.tf-many .answer-instrument{margin:0}
.tf-howto .tf-env,.tf-fix .tf-env{background:#1b1f23;color:#d7dde2;border-top:1px solid var(--tf-dline)}
/* 해결 */
.tf-body{display:grid;grid-template-columns:310px 1fr}
.tf-sel{padding:28px;border-right:1px solid var(--tf-dline)}
.tf-sel p{margin:0 0 14px!important;font-size:12.5px;color:var(--tf-dtext);font-weight:700}
.tf-sel button{all:unset;cursor:pointer;display:flex;align-items:center;gap:12px;width:100%;padding:13px 15px;margin-bottom:9px;border:1px solid var(--tf-dline);border-radius:11px;font-size:14.5px;font-weight:600;line-height:1.4;color:#c9d0d6;box-sizing:border-box;transition:border-color .15s,background .15s}
.tf-sel button:hover{border-color:#4a525a}
.tf-sel button i{width:30px;height:16px;border-radius:9px;background:#2b3035;position:relative;flex:none;transition:.2s}
.tf-sel button i::after{content:"";position:absolute;left:2px;top:2px;width:12px;height:12px;border-radius:50%;background:#7d868e;transition:.2s}
.tf-sel button[aria-pressed=true]{border-color:#ff5a1f88;color:#fff;background:#1d2126}
.tf-sel button[aria-pressed=true] i{background:#ff5a1f55}.tf-sel button[aria-pressed=true] i::after{left:16px;background:var(--tf-mark)}
.tf-sel button:focus-visible{outline:2px solid var(--tf-mark);outline-offset:2px}
.tf-fits{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.tf-fits li{border:1px solid var(--tf-dline);border-radius:11px;padding:11px 14px;font-size:14px;font-weight:600;line-height:1.45;color:#dfe4e8;margin:0}
.tf-steps{padding:28px 32px}.tf-steps[hidden]{display:none}
.tf-steps h3{margin:0 0 18px;font-size:22px;line-height:1.35;letter-spacing:-.035em;color:#fff}
.tf-steps ol{list-style:none;margin:0;padding:0;counter-reset:s}
.tf-steps ol li{counter-increment:s;display:grid;grid-template-columns:36px 1fr;gap:3px 14px;padding:14px 0;margin:0;border-top:1px solid var(--tf-dline)}
.tf-steps ol li::before{content:counter(s);grid-row:span 2;width:27px;height:27px;border-radius:50%;border:1.5px solid #3a4148;display:grid;place-items:center;font:700 12.5px var(--tf-mono);color:#cfd5da}
.tf-steps ol li:first-child::before{border-color:var(--tf-mark);color:var(--tf-mark);box-shadow:0 0 0 4px #ff5a1f1f}
.tf-steps ol b{font-size:15px;line-height:1.45}.tf-steps ol small{color:var(--tf-dtext);font-size:13.5px;line-height:1.5}
.tf-done{display:flex;gap:10px;align-items:center;margin-top:6px;padding:13px 0 0;border-top:1px solid var(--tf-dline);font-size:14px;color:#dfe4e8}
.tf-done span{font-size:12.5px;font-weight:700;color:var(--tf-dtext)}.tf-done i{width:8px;height:8px;border-radius:50%;background:var(--tf-ok);box-shadow:0 0 0 3px #1aa86826}
/* 비교 */
.tf-cmp{background:#2a2f34;color:#eef1f3;border:5px solid #1e2226}
.tf-cmp .tf-bar{color:#cdd3d8;border-bottom:1px solid #3a4046}
.tf-cmp .tf-t{background:#e9edf0;color:#2a2f34}
.tf-chs,.tf-row{display:grid;grid-template-columns:1fr 150px 1fr}
.tf-ch{padding:24px 28px 12px}
.tf-ch small{font-size:12.5px;font-weight:700;color:#a6afb6}
.tf-ch h3{margin:6px 0 0;font-size:24px;letter-spacing:-.04em;color:#eef1f3}
.tf-ch.tf-b h3{color:#fff}.tf-ch.tf-b small{color:#ffc46b}
.tf-spine{border-left:1px solid #3a4046;border-right:1px solid #3a4046;background:#25292e;display:flex;align-items:flex-end;justify-content:center;padding-bottom:14px;font-size:12px;font-weight:700;color:#97a1a9}
.tf-row{border-top:1px solid #3a4046}
.tf-row div{padding:15px 28px;font-size:14.5px;line-height:1.55}
.tf-row .tf-k{background:#25292e;border-left:1px solid #3a4046;border-right:1px solid #3a4046;font-size:12.5px;font-weight:700;color:#b3bcc3;text-align:center;display:flex;align-items:center;justify-content:center;padding:15px 10px}
.tf-row .tf-a{color:#cdd3d8}.tf-row .tf-rb{color:#fff;font-weight:600}
.tf-when{display:flex;flex-wrap:wrap;gap:8px;padding:16px 28px;border-top:1px solid #3a4046;background:#25292e}
.tf-when span{font-size:13px;border:1px solid #4a5158;border-radius:999px;padding:5px 12px;color:#dde1e4}.tf-when b{color:#ffc46b;font-weight:700;margin-right:6px}
.tf-cmp .tf-env{color:#cdd3d8;border-top:1px solid #3a4046}
/* 해설: 금속 명판 */
.tf-plate{background:linear-gradient(180deg,#f5f7f8,#e3e7ea);border:1px solid #b9c0c6;box-shadow:inset 0 1px 0 #fff,inset 0 -1px 0 #c7cdd2,0 1px 2px #0000000d;color:var(--tf-ink)}
.tf-plate::before,.tf-plate::after,.tf-plate .tf-s1,.tf-plate .tf-s2{content:"";position:absolute;width:9px;height:9px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#fff,#9aa3ab 70%);box-shadow:inset 0 0 0 1px #8b949c}
.tf-plate::before{left:12px;top:12px}.tf-plate::after{right:12px;top:12px}.tf-plate .tf-s1{left:12px;bottom:12px}.tf-plate .tf-s2{right:12px;bottom:12px}
.tf-plate .tf-bar{padding:22px 38px 0;color:#3f474e}
.tf-eng{font-size:13px;font-weight:800;color:#1f262c}.tf-eng b{font-weight:800;margin-right:8px;color:#2b3237;letter-spacing:.02em}
.tf-plate .tf-say{padding:16px 38px 24px;font-size:22px;font-weight:700;line-height:1.55;letter-spacing:-.035em;max-width:860px}
/* 쉬운 해설: the 「한눈에 보기」 lines engraved on the plate (report 1-260) */
.tf-plate .tf-glance{font-size:17px;font-weight:600;line-height:1.6}
.tf-glance p{margin:0 0 8px;display:grid;grid-template-columns:5.6em 1fr;gap:12px}
.tf-glance p:last-child{margin-bottom:0}
.tf-glance b{padding-top:3px;font-size:12.5px;font-weight:800;letter-spacing:.02em;color:#4b5864}
@media(max-width:700px){.tf-plate .tf-glance{font-size:15.5px}.tf-glance p{grid-template-columns:1fr;gap:0}}
.tf-cells{display:grid;grid-template-columns:repeat(var(--n,4),1fr);margin:0 26px;border-top:1px solid #b9c0c6}
.tf-cells div{padding:16px 14px 18px;border-left:1px solid #c9ced3}.tf-cells div:first-child{border-left:0}
.tf-cells small{display:block;font-size:12px;font-weight:800;color:#1f262c;letter-spacing:.04em;margin-bottom:7px}
.tf-cells b{font-size:19px;font-weight:800;color:#0f1113;letter-spacing:-.035em;text-shadow:0 1px 0 #fff;line-height:1.35;display:block}
.tf-cells b.is-long{font-size:15.5px;line-height:1.45}
.tf-cells b.x{color:#a8321a}
.tf-plate .tf-env{margin-top:6px;border-top:1px solid #c9ced3;background:#dde2e5;padding:15px 38px;color:#2b3237}
.tf-plate>.tf-cells:last-child{margin-bottom:22px}
/* 확인 가이드 */
.tf-board{background:#101315;color:#e9edf0;border:5px solid #0a0c0d}
.tf-board .tf-bar{border-bottom:1px solid #262b30;color:#c9d0d6}
.tf-board .tf-t{background:#e9edf0;color:#101315}
.tf-main{display:grid;grid-template-columns:1fr 250px}
.tf-head{padding:26px 32px 16px;font-size:24px;font-weight:800;line-height:1.35;letter-spacing:-.04em}
.tf-head small{display:block;font-size:12.5px;font-weight:700;color:#97a1a9;margin-bottom:8px;letter-spacing:-.01em}
.tf-board ul{list-style:none;margin:0;padding:0 32px 12px}
.tf-board li{display:grid;grid-template-columns:200px 1fr;gap:20px;align-items:center;padding:13px 0;margin:0;border-top:1px solid #262b30}
.tf-board li b{font-size:15px;line-height:1.45}
.tf-st{display:flex;align-items:center;gap:10px;font-size:14px;line-height:1.45;color:#d6dbe0}
.tf-st i,.tf-sum i{width:10px;height:10px;border-radius:50%;flex:none}
.tf-board .ok i{background:var(--tf-ok)}.tf-board .open i{background:var(--tf-amber);box-shadow:0 0 8px #ffb22488}.tf-board .false i{background:#ff5a1f;box-shadow:0 0 8px #ff5a1f88}.tf-board .prog i{background:#7fa7c9}
.tf-sum{border-left:1px solid #262b30;background:#15191c;padding:26px 24px;display:flex;flex-direction:column;gap:16px}
.tf-sum p{margin:0;font-size:12.5px;font-weight:700;color:#97a1a9}
.tf-sum div{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding-bottom:12px;border-bottom:1px solid #262b30}
.tf-sum div span{font-size:13.5px;color:#cfd5da}
.tf-sum strong{font:700 28px var(--tf-mono);color:#fff}
.tf-sum a{margin-top:auto;font-size:13px;font-weight:600;color:#ffc46b;text-decoration:none}
.tf-board .tf-env{color:#c9d0d6;border-top:1px solid #262b30;background:#15191c}
/* 논문 해설(4차): 원래 은색 판의 절제 */
.tf-paper{--navy:#22374f;background:linear-gradient(135deg,#f7f8f9,#e2e6e9 55%,#f0f2f4);border:1px solid #c6ccd1;box-shadow:inset 0 1px 0 #fff;color:#1f262d}
.tf-paper .tf-bar{border-bottom:1px solid #d3d8dc;padding:18px 32px}
/* 이름표는 상자 없이 글자로만: 진한 「논문 해설」, 머리카락 선, 옅은 영문 */
.tf-paper .tf-tag{gap:0}
.tf-paper .tf-t{background:none;border:0;border-radius:0;padding:0;color:#1c242c;font-size:13.5px;font-weight:700;letter-spacing:-.01em}
.tf-paper .tf-tag em{font-size:10.5px;font-weight:600;font-style:normal;letter-spacing:.24em;color:#8a9298;margin-left:14px;padding-left:14px;border-left:1px solid #c3c9ce;line-height:14px}
.tf-ids{display:flex;flex-wrap:wrap;gap:6px 22px;padding:14px 32px 0;font-size:12.5px;color:#5d656d}
.tf-ids b{font-weight:600;color:#2f373e;margin-right:6px}
.tf-paper .tf-say{padding:14px 32px 14px;font-size:18px;font-weight:500;line-height:1.75;max-width:860px;letter-spacing:-.025em}
/* 논문의 보고 한 줄: 큰 숫자와 같은 얇은 굵기, 남색 머리카락 선 하나 — 판의 절제를 지킨다 */
.tf-claim{margin:0;padding:22px 32px 26px;max-width:900px;font-size:27px;font-weight:300;line-height:1.5;letter-spacing:-.04em;color:#1c242c;word-break:keep-all}
.tf-claim small{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:12px;font-weight:600;letter-spacing:.02em;color:#6c757d}
.tf-claim small::before{content:"";width:22px;height:2px;background:var(--navy)}
.tf-gauges{display:grid;grid-template-columns:1.5fr 1fr;margin:10px 32px 6px;border-top:1px solid #d3d8dc}
.tf-g{padding:20px 30px 22px 0}.tf-g+.tf-g{padding:20px 0 22px 30px;border-left:1px solid #d3d8dc}
.tf-g h4{margin:0 0 16px;font-size:12.5px;font-weight:600;color:#4d555c;display:flex;justify-content:space-between;gap:10px}
.tf-g h4 em{font-size:12px;font-weight:500;font-style:normal;color:#80888f}
.tf-bars{display:grid;gap:14px}
.tf-bars div{display:grid;grid-template-columns:150px 1fr 84px;align-items:center;gap:14px;font-size:13px;color:#4a525a}
.tf-bars s{display:block;height:2px;background:#cdd2d6;position:relative;text-decoration:none}
.tf-bars u{position:absolute;inset:0 auto 0 0;background:#8b959e;text-decoration:none}
.tf-bars div:last-child u{background:var(--navy)}
.tf-bars em{font-size:24px;font-weight:300;font-style:normal;color:#39424a;text-align:right;letter-spacing:-.03em;line-height:1}
.tf-bars div:last-child em{color:var(--navy);font-weight:400}
.tf-g p{margin:16px 0 0!important;font-size:12.5px;color:#61696f;line-height:1.55}
.tf-cost{display:flex;align-items:flex-end;gap:18px}
.tf-cost div{flex:1}.tf-cost small{display:block;font-size:12.5px;font-weight:600;color:#4d555c;margin-bottom:6px}
.tf-cost b{font-size:34px;font-weight:300;line-height:1.05;color:#39424a;letter-spacing:-.04em}.tf-cost b.hi{color:var(--navy);font-weight:400}
.tf-cost>span{font-size:12px;color:#8a9298;padding-bottom:8px}
.tf-paper .tf-env{border-top:1px solid #d3d8dc;color:#2b3237;padding:16px 32px}
@media(max-width:860px){
 .tf-panel{margin:16px 0 6px;border-radius:14px}
 .tf-bar{padding:14px 18px;flex-wrap:wrap;row-gap:8px}
 .tf-env{grid-template-columns:1fr;gap:4px;padding:14px 18px}.tf-env a{justify-self:start;margin-top:4px}
 .tf-one{padding:24px 20px}.tf-ans{font-size:26px}.tf-ans.is-long{font-size:19px}.tf-ans small{display:block;margin:6px 0 0;font-size:16px}
 .tf-ans small:has(>.tf-sw:only-child){display:inline;margin:0 0 0 6px}
 .tf-many{padding:16px 14px}
 .tf-path{flex-direction:column;align-items:stretch;row-gap:0}
 .tf-path li{font-size:14.5px;position:relative;padding-left:34px}
 .tf-path li::after{content:counter(p);position:absolute;left:0;top:50%;transform:translateY(-50%);width:22px;height:22px;border-radius:50%;border:1.5px solid #ffffff45;display:grid;place-items:center;font:700 11px var(--tf-mono)}
 .tf-path li+li::before{position:absolute;left:10.5px;top:-6px;width:1.5px;height:12px;margin:0}
 .tf-path li span{flex:1;margin:6px 0;padding:9px 13px}
 .tf-path li:last-child::after{border-color:#fff;background:#fff;color:var(--tf-ink)}
 .tf-body{grid-template-columns:1fr}.tf-sel{border-right:0;border-bottom:1px solid var(--tf-dline);padding:18px 18px 12px;display:flex;flex-wrap:wrap;gap:8px}
 .tf-sel p{width:100%;margin:0 0 4px!important}.tf-sel button{width:auto;flex:none;font-size:13.5px;padding:9px 12px;margin:0}
 .tf-fits{width:100%}.tf-steps{padding:20px 18px}.tf-steps h3{font-size:19px}
 .tf-chs{grid-template-columns:1fr 1fr}.tf-spine{display:none}.tf-ch{padding:18px 18px 10px}.tf-ch h3{font-size:18px}
 .tf-row{grid-template-columns:1fr 1fr}.tf-row .tf-k{order:-1;grid-column:1/-1;justify-content:flex-start;text-align:left;border:0;padding:10px 18px 4px;background:#2f353a}
 .tf-row div{padding:8px 18px 13px;font-size:13.5px}.tf-when{padding:14px 18px}
 .tf-plate .tf-bar{padding:20px 26px 0}.tf-plate .tf-say{padding:12px 26px 20px;font-size:18.5px}
 .tf-cells{grid-template-columns:1fr 1fr;margin:0 16px}.tf-cells div:nth-child(3){border-left:0}.tf-cells div:nth-child(n+3){border-top:1px solid #c9ced3}
 .tf-plate .tf-env{padding:14px 26px}
 .tf-main{grid-template-columns:1fr}.tf-head{padding:20px 18px 12px;font-size:20px}.tf-board ul{padding:0 18px 8px}
 .tf-board li{grid-template-columns:1fr;gap:6px}
 .tf-sum{border-left:0;border-top:1px solid #262b30;padding:16px 18px;flex-direction:row;flex-wrap:wrap;gap:8px 18px}
 .tf-sum p{width:100%}.tf-sum div{border:0;padding:0;gap:7px}.tf-sum strong{font-size:20px}.tf-sum a{margin-top:0;width:100%}
 .tf-paper .tf-bar{padding:14px 18px}.tf-ids{padding:12px 18px 0;gap:6px 16px}.tf-paper .tf-say{padding:12px 18px 4px;font-size:16.5px}.tf-claim{padding:16px 18px 18px;font-size:21px}
 .tf-gauges{grid-template-columns:1fr;margin:14px 18px 4px}.tf-g{padding:16px 0}.tf-g+.tf-g{padding:16px 0;border-left:0;border-top:1px solid #d3d8dc}
 .tf-bars div{grid-template-columns:118px 1fr 64px;gap:10px;font-size:12.5px}.tf-bars em{font-size:20px}.tf-cost b{font-size:28px}.tf-paper .tf-env{padding:14px 18px}
}
/* 10/17 그림 재료: 논문 은색 판은 같은 그라데이션 아래로 솔질 금속결이 14%만 비친다(테두리·그림자는 그대로). */
.tf-paper{background:linear-gradient(135deg,rgba(247,248,249,.86),rgba(226,230,233,.86) 55%,rgba(240,242,244,.86)),url(../brand/panel-silver.webp) center/cover}
/* 해설 명판은 3차 확정의 CSS 판으로 둔다. 10/17의 판 그림(panel-nameplate.webp)은 결이 강하고 글자가 나사에 붙어 10/18 사용자 결정으로 뺐다. */
/* 해설 명판 — 10/18 사용자 결정: 3차 구조 그대로 색·글자만: 조금 더 차가운 강철빛 판, 글자는 판에 새긴 흰 하이라이트, 이름표·칸 이름은 강철 회청색. */
.tf-plate{background:linear-gradient(180deg,#f7f9fa 0%,#e8edf0 60%,#dfe5e9 100%);border-color:#b3bbc2}
.tf-plate .tf-eng{color:#3b6079;font-weight:700;letter-spacing:.05em;text-shadow:0 1px 0 #ffffffd9}
.tf-plate .tf-eng b{color:#1c2328;font-weight:800;letter-spacing:.01em}
.tf-plate .tf-lamp{color:#55636e;text-shadow:0 1px 0 #ffffffcc}
.tf-plate .tf-say{color:#12171b;text-shadow:0 1px 0 #ffffffb3}
.tf-plate .tf-cells{border-top-color:#b7c0c7}
.tf-plate .tf-cells div{border-left-color:#c6cdd3}
.tf-plate .tf-cells small{color:#4b6274;font-weight:700;text-shadow:0 1px 0 #ffffffd9}
.tf-plate .tf-cells b{color:#101417}
/* How-to panel details (10/17): a machined edge, the value in a recessed readout, on/off as a switch, the last step lit. */
.tf-howto{box-shadow:inset 0 1px 0 rgba(255,255,255,.07),inset 0 0 0 1px #262c31}
.tf-howto .tf-read{display:inline-block;padding:0 10px;border-radius:7px;background:#0d1012;color:#fff;box-shadow:inset 0 1px 3px rgba(0,0,0,.7),inset 0 0 0 1px #22282d,0 1px 0 rgba(255,255,255,.05);line-height:1.6}
.tf-howto .tf-value{font-weight:700}
.tf-howto .tf-sw{display:inline-block;position:relative;width:40px;height:23px;border-radius:12px;background:var(--tf-ok);vertical-align:-5px;margin-left:2px;box-shadow:inset 0 1px 3px rgba(0,0,0,.35)}
.tf-howto .tf-sw::after{content:"";position:absolute;top:3px;right:3px;width:17px;height:17px;border-radius:50%;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.4)}
.tf-howto .tf-sw.off{background:#4a535a}.tf-howto .tf-sw.off::after{right:auto;left:3px}
.tf-howto .tf-ans small .tf-sw{vertical-align:-3px}
.tf-howto .tf-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.tech-article-view .tf-howto .answer-case .sig li.on::before{background:var(--tf-mark);box-shadow:0 0 0 3px #ff5a1f2e,0 0 9px #ff5a1f80}
.tf-howto .tf-path li:last-child span::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--tf-mark);box-shadow:0 0 6px #ff5a1f99;margin-right:8px;vertical-align:2px}

/* 10/17: shallow instrument bezels only; preserve geometry, type, content and lamp meanings. */
.tf-howto,.tf-fix{box-shadow:inset 0 1px 0 #ffffff12,inset 0 0 0 1px #31373d,0 1px 1px #00000012}
.tf-howto .tf-bar,.tf-fix .tf-bar{box-shadow:inset 0 1px 0 #ffffff05,0 1px 0 #00000040}
.tf-howto .tf-env,.tf-fix .tf-env{box-shadow:inset 0 1px 0 #ffffff06}
.tf-cmp{box-shadow:inset 0 1px 0 #ffffff12,inset 0 0 0 1px #454d54,0 1px 1px #00000012}
.tf-cmp .tf-spine,.tf-cmp .tf-k{box-shadow:inset 1px 0 0 #ffffff04,inset -1px 0 0 #00000030}
.tf-fix .tf-sel button{box-shadow:inset 0 1px 0 #ffffff06,0 1px 0 #00000040}

/* 10/18: the answer card is a way to its section (article-design.mjs), so the pointer and underline mean what they show. */
.tech-article-view .answer-case.is-linked,.tf-one.is-linked{cursor:pointer}
.tf-one.is-linked:hover .tf-ans{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:6px}
.tf-body.no-sel{grid-template-columns:1fr}
/* 「이 글 보내기」 at the end of an article (report 1-228): each button looks like what it does — KakaoTalk in its soft
   yellow with the speech bubble, the link as a light instrument key that turns green when copied. */
.tech-share{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;margin:28px 0 6px;padding:14px 0;border-top:1px solid #d6dbdf;border-bottom:1px solid #d6dbdf}
.tech-share>b{font-size:14px;font-weight:800;color:#1f262c;margin-right:4px}
.tech-article-view .body .tech-share button{display:inline-flex;align-items:center;gap:7px;padding:8px 14px 8px 12px;border-radius:999px;font-family:inherit;font-size:13px;font-weight:700;line-height:1.2;cursor:pointer;transition:background-color .15s,border-color .15s,color .15s}
.tech-article-view .body .tech-share button svg{flex:none}
.tech-article-view .body .tech-share .tech-share__kakao{border:1px solid #e3cf86;background:#f6eab8;color:#3a3104}
.tech-article-view .body .tech-share .tech-share__kakao:hover{background:#f0df9c}
.tech-article-view .body .tech-share .tech-share__link{border:1px solid #c3cad1;background:linear-gradient(180deg,#fff,#eef1f3);color:#1f262c;box-shadow:inset 0 -1px 0 #d3d8dc}
.tech-article-view .body .tech-share .tech-share__link:hover{border-color:#14171a}
.tech-article-view .body .tech-share .tech-share__link.is-done{border-color:#1a7f52;background:#e9f5ef;color:#14663f}
.tech-share__done{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* 「이 글에는」 strip above the first panel (inc/glance.php, user decision 2026-10-24, report 1-257) */
.t-strip{max-width:980px;display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;align-items:center;margin:18px 0 10px;background:#2a2f34;border-radius:9px;padding:0 6px;box-shadow:inset 0 1px 0 #3b4248}
.t-strip em{flex:none;white-space:nowrap;font-style:normal;font-size:12px;font-weight:800;letter-spacing:.12em;color:#c3cbd1;padding:10px 12px}
.t-strip a{display:flex;align-items:baseline;gap:6px;padding:10px 12px;color:#d4dadf;text-decoration:none;font-size:12.5px;font-weight:600;border-left:1px solid #3b4248;white-space:nowrap;flex:none}
.t-strip a span{max-width:10.5em;overflow:hidden;text-overflow:ellipsis}
.t-strip b{font:700 14px/1 ui-monospace,Consolas,monospace;color:#ff7a3d}
.t-strip a:hover{color:#fff}
.by .by-how{font-weight:500}.by a{color:inherit}
h2[id^="tech-"]{scroll-margin-top:16px}
@media(max-width:700px){.t-strip a span{max-width:9em}}
.t-strip::-webkit-scrollbar{display:none}

/* Strip per kind (user decision 2026-10-24, report 1-259): explainer in the plate's steel; a paper has no strip but an
   engraved row inside its silver panel, and finer silver details. How-to, fix and comparison keep the graphite. */
.k-exp:not(.article-paper) .t-strip{background:linear-gradient(180deg,#eef1f3,#dfe4e8);box-shadow:inset 0 1px 0 #fff,0 0 0 1px #c6cdd3}
.k-exp:not(.article-paper) .t-strip em{color:#4b6274;letter-spacing:.14em}
.k-exp:not(.article-paper) .t-strip a{color:#24333f;border-left:1px solid #c6cdd3}
.k-exp:not(.article-paper) .t-strip a b{color:#3b6079;font-weight:800}
.k-exp:not(.article-paper) .t-strip a:hover{color:#000}
.tf-paper .tp-index{display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 38px;padding:10px 0;border-top:1px solid #c9ced3;border-bottom:1px solid #fff}
.tf-paper .tp-index::-webkit-scrollbar{display:none}
.tf-paper .tp-index em{flex:none;font-style:normal;font-size:10.5px;font-weight:700;letter-spacing:.24em;color:#7d868e;padding:4px 14px 4px 0;margin-right:4px;border-right:1px solid #c3c9ce;white-space:nowrap}
.tf-paper .tp-index a{flex:none;display:flex;align-items:baseline;gap:6px;padding:4px 14px;color:#2d3a46;text-decoration:none;font-size:12.5px;font-weight:600;white-space:nowrap}
.tf-paper .tp-index a span{max-width:14em;overflow:hidden;text-overflow:ellipsis}
.tf-paper .tp-index a b{font:300 17px/1 -apple-system,"Segoe UI",sans-serif;color:#1f3a5f;letter-spacing:-.02em}
.tf-paper .tp-index a:hover{color:#1f3a5f}
.tf-paper{position:relative}
.tf-paper::after{content:"";position:absolute;inset:6px;border:1px solid #ffffffb3;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 0 1px #00000008}
.tf-paper::before{content:"";position:absolute;left:0;right:0;top:0;height:90px;border-radius:inherit;background:linear-gradient(180deg,#ffffff8c,#fff0);pointer-events:none}
.tf-paper .tp-serial{font:500 11px/1 ui-monospace,Consolas,monospace;letter-spacing:.08em;color:#6c7781;margin-left:14px;padding-left:14px;border-left:1px solid #c3c9ce}
@media(max-width:700px){.tf-paper .tp-index{margin:0 18px}.tf-paper .tp-serial{display:none}}
/* 내 기기 답 먼저 (report 1-275, article-device.js): one line above per-device answers, the reader's answer first with an orange lamp. */
.mine-bar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:6px 10px;margin:0 26px;padding:14px 0 0;color:#d4dadf;font-size:14px;font-weight:600;line-height:1.5}
.mine-bar>i{align-self:start;margin-top:8px;width:7px;height:7px;border-radius:50%;background:var(--mark,#ff5a1f);box-shadow:0 0 0 3px #ff5a1f2e}
@media(max-width:860px){.mine-bar__others{grid-column:2/-1}.mine-bar{grid-template-columns:auto minmax(0,1fr)}}
.mine-bar__others{display:inline-flex;flex-wrap:wrap;align-items:center;gap:6px;color:#9aa5ad;font-weight:500}
.mine-bar__others button{min-height:34px;padding:4px 11px;border:1px solid #56626b;border-radius:999px;background:transparent;color:#e6eaed;font:inherit;font-weight:600}
.mine-bar__others button:hover{border-color:#8d9aa3;color:#fff}
.tech-article-view .answer-case.is-mine .answer-device,.tech-article-view .answer-case.is-mine .answer-scope{color:#ffd2bd}
.tech-article-view .answer-case.is-mine{box-shadow:inset 0 2px 0 var(--mark,#ff5a1f);padding-top:14px}
@media(max-width:860px){.mine-bar{margin:0 18px;font-size:14px}.tech-article-view .answer-case.is-mine+.answer-case{padding-top:19px}}
.tech-share__for{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;flex-basis:100%;font-size:14px;color:#46525b}
.tech-share__for span{font-weight:700;margin-right:2px}
.tech-article-view .body .tech-share .tech-share__for button{padding:6px 12px;font-size:14px;border:1px solid #c3cbd1;background:#fff;color:#2b343b}
.tech-article-view .body .tech-share .tech-share__for button[aria-pressed=true]{border-color:#1f262c;background:#1f262c;color:#fff}
/* 이어서 하기 (report 1-275, article-progress.js): a bar at the bottom on return to a reloaded page. */
.resume-bar{position:fixed;left:50%;bottom:max(14px,env(safe-area-inset-bottom));transform:translateX(-50%);z-index:60;display:flex;align-items:center;gap:10px;width:min(560px,calc(100% - 24px));padding:10px 10px 10px 16px;border-radius:12px;background:#14171a;color:#eef1f3;font-size:15px;font-weight:600;line-height:1.45;box-shadow:0 8px 28px #0006}
.resume-bar span{flex:1;min-width:0}
.resume-bar__go{flex:none;min-height:40px;padding:6px 14px;border:0;border-radius:9px;background:var(--mark,#ff5a1f);color:#fff;font:inherit;font-weight:800}
.resume-bar__close{flex:none;width:40px;min-height:40px;border:0;background:transparent;color:#aab3ba;font-size:22px;line-height:1}
/* A step that is hard to undo (article-progress.js warnRisky). */
.tech-article-view .body .tech-path li.is-risky span{border-color:#c2410c;background:#fff4ee;color:#8a2f0c}
.tech-article-view .body .path-risky{margin:-4px 0 14px;padding:8px 12px;border-left:3px solid #c2410c;background:#fff7f2;color:#5c2410;font-size:15px;font-weight:600;line-height:1.55}
/* 이 글 듣기 (report 1-275, article-listen.js): one button under the byline; the bar shows only while listening. */
.tech-article-view .ah .listen-btn{display:inline-flex;align-items:center;gap:6px;margin:14px 0 0;min-height:42px;padding:7px 16px 7px 14px;border:0;border-radius:999px;background:#2a2f34;color:#fff;font:inherit;font-size:15px;font-weight:700;cursor:pointer;box-shadow:inset 0 1px 0 #3b4248}
.tech-article-view .ah .listen-btn span{color:var(--mark,#ff5a1f);font-size:13px}
.tech-article-view .ah .listen-btn small{font-size:14px;font-weight:500;color:#c3cbd1}
html[data-big-text] .tech-article-view .ah .listen-btn{min-height:52px;padding:10px 20px;font-size:19px}
html[data-big-text] .tech-article-view .ah .listen-btn small{font-size:17px}
.tech-article-view .body .is-reading,.tech-article-view .is-reading{background:#fff2c2;box-shadow:0 0 0 6px #fff2c2;border-radius:3px;transition:background-color .2s}
.tech-article-view .tf-panel .is-reading{background:#3a3524;box-shadow:0 0 0 6px #3a3524}
html.is-listening .resume-bar{display:none}
.listen-bar{position:fixed;left:50%;bottom:max(12px,env(safe-area-inset-bottom));transform:translateX(-50%);z-index:61;width:min(560px,calc(100% - 20px));padding:10px 10px 10px 14px;border-radius:14px;background:#14171a;color:#eef1f3;box-shadow:0 8px 28px #0006}
.listen-bar__now{margin:0 0 8px;font-size:15px;font-weight:600;line-height:1.45;color:#d4dadf}
.listen-bar__row{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.listen-bar__row button,.listen-bar__out{min-height:44px;min-width:44px;padding:6px 10px;border:1px solid #3b4248;border-radius:10px;background:transparent;color:#eef1f3;font:inherit;font-size:15px;font-weight:700;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.listen-bar__row .listen-bar__main,.listen-bar__out{flex:1;border:0;background:var(--mark,#ff5a1f);color:#fff;font-size:17px}
.listen-bar__row [data-act=close]{border:0;color:#aab3ba;font-size:20px}
html[data-big-text] .listen-bar__now{font-size:18px}html[data-big-text] .listen-bar__row button,html[data-big-text] .listen-bar__out{min-height:52px;font-size:18px}
.listen-bar__row .listen-bar__stuck{border-color:#7a4a32;color:#ffd2bd}
/* 11/2 (사용자): 「이 글 보내기」 — 제목 아래 두 단추를 같은 너비로 한 줄에, 크게 */
.tech-article-view .body .tech-share{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;align-items:stretch;padding:16px 0 18px}
.tech-article-view .body .tech-share>b{grid-column:1/-1;margin:0;font-size:15px}
.tech-article-view .body .tech-share .tech-share__kakao,.tech-article-view .body .tech-share .tech-share__link{justify-content:center;gap:8px;min-height:50px;padding:10px 12px;border-radius:12px;font-size:15.5px;font-weight:800;white-space:nowrap}
.tech-article-view .body .tech-share .tech-share__kakao svg,.tech-article-view .body .tech-share .tech-share__link svg{width:19px;height:19px}
.tech-article-view .body .tech-share .tech-share__kakao[hidden]{display:none}
.tech-article-view .body .tech-share .tech-share__kakao[hidden]+.tech-share__link{grid-column:1/-1}
.tech-article-view .body .tech-share .tech-share__for{grid-column:1/-1}
@media(max-width:360px){.tech-article-view .body .tech-share .tech-share__kakao,.tech-article-view .body .tech-share .tech-share__link{font-size:14.5px;gap:6px;padding:10px 8px}}
/* 11/2 (사용자): 「도움이 되었나요」 위로 옮기고 PC에서도 잘 보이게 — 테두리 상자, 큰 제목·단추 */
.tech-article-view .body .tech-share{margin:26px 0 30px;padding:16px;border:1px solid #d6dbdf;border-radius:14px;background:#f7f8f9}
.tech-article-view .body .tech-share>b{font-size:16px}
.tech-article-view .body .tech-share .tech-share__kakao{border-color:#e6c84f;background:#fbe27a;color:#2e2600}
.tech-article-view .body .tech-share .tech-share__kakao:hover{background:#f7d955}
.tech-article-view .body .tech-share .tech-share__link{background:#fff}
@media(min-width:768px){.tech-article-view .body .tech-share{padding:20px 22px;gap:12px}.tech-article-view .body .tech-share>b{font-size:18px}.tech-article-view .body .tech-share .tech-share__kakao,.tech-article-view .body .tech-share .tech-share__link{min-height:56px;font-size:17px}.tech-article-view .body .tech-share .tech-share__kakao svg,.tech-article-view .body .tech-share .tech-share__link svg{width:21px;height:21px}}
/* 11/2 (사용자): 저장을 보내기 상자 제목 줄 오른쪽으로 — 챙기기·보내기를 한곳에. 저장 목록은 제자리, 저장한 글이 없으면 그 줄은 숨김 */
.tech-article-view .body .tech-share.has-save>b{grid-column:1;align-self:center}
.tech-article-view .body .tech-share>.tech-share__save{grid-column:2;grid-row:1;justify-self:end;align-self:center;position:relative;min-width:0}
.tech-article-view .body .tech-share .tech-share__save .reader-saved{display:block}
.tech-article-view .body .tech-share .tech-share__save button{min-height:40px;padding:7px 15px 7px 12px;gap:7px;border:1px solid #c3cad1;border-radius:999px;background:#fff;color:#1f262c;font-size:14.5px;font-weight:700;white-space:nowrap}
.tech-article-view .body .tech-share .tech-share__save button:hover{border-color:#14171a;background:#fff}
.tech-article-view .body .tech-share .tech-share__save button[aria-pressed=true]{border-color:#1f262c;background:#1f262c;color:#fff}
.tech-article-view .body .tech-share .tech-share__save .reader-saved-feedback{position:absolute;right:0;top:calc(100% + 6px);z-index:2;width:max-content;max-width:min(300px,78vw);padding:7px 10px;border-radius:8px;background:#1f262c;color:#fff;font-size:12.5px;line-height:1.5;text-align:left;pointer-events:none;animation:tech-save-note 3.2s forwards}
@keyframes tech-save-note{0%,80%{opacity:1}100%{opacity:0;visibility:hidden}}
.tech-article-view .body .tech-share .tech-share__save .reader-saved-feedback:empty{display:none}
html[data-tech-saved="0"] .tech-article-view .body .tech-share.has-save~.reader-saved-page{display:none}
@media(min-width:768px){.tech-article-view .body .tech-share .tech-share__save button{min-height:44px;font-size:15.5px;padding:8px 18px 8px 14px}}
/* 11/2 (사용자): 공식 안내·확인한 자료·확인 범위·본문 변경 기록의 세로를 줄임 — 공식 안내는 선·여백 없이 낮게, 나머지는 한 묶음(가는 선으로 나눈 46px 줄) */
.tech-article-view .body .editorial-official-action.tech-official{margin:28px 0 10px;padding:0;border:0}
.tech-article-view .body .tech-official h2{font-size:13.5px;margin:0 0 7px}
.tech-article-view .body .tech-official-links a{padding:10px 14px;line-height:1.5}
.tech-article-view .body>:is(details.tech-sources,details.instrument-evidence,details.article-change-log){margin:0;border:1px solid #c3ced3;border-radius:0;background:#f5f6f6;box-shadow:none;max-width:none}
.tech-article-view .body>:not(:is(details.tech-sources,details.instrument-evidence,details.article-change-log))+:is(details.tech-sources,details.instrument-evidence,details.article-change-log){margin-top:10px;border-top-left-radius:10px;border-top-right-radius:10px}
.tech-article-view .body>:is(details.tech-sources,details.instrument-evidence,details.article-change-log):not(:has(+:is(details.tech-sources,details.instrument-evidence,details.article-change-log))){margin-bottom:26px;border-bottom-left-radius:10px;border-bottom-right-radius:10px}
.tech-article-view .body>:is(details.tech-sources,details.instrument-evidence,details.article-change-log)+:is(details.tech-sources,details.instrument-evidence,details.article-change-log){border-top:0}
.tech-article-view .body>details.tech-sources>summary{min-height:46px;box-sizing:border-box;align-items:center;padding:10px 14px}
.tech-article-view .body>details.instrument-evidence>summary{min-height:46px;padding:9px 14px}
.tech-article-view .body>details.article-change-log>summary{min-height:46px;padding:10px 14px}
@media(max-width:600px){.tech-article-view .body .tech-official-links a{gap:1px 10px;padding:9px 12px}.tech-article-view .body .tech-official-pub{font-size:11.5px}}