/* StudioKitHQ: khung "tủ rack phòng thu", mặt nhôm sáng (sếp 23/10: chỉ giao diện sáng, không dark mode). Header = mặt rack có ốc + đèn VU + dải channel có LED; footer = patch bay (link là lỗ jack).
   Thân bài sáng, dễ đọc; thông số dùng mono như nhãn in trên máy. */
:root{
  --rack:#e7e6e2;--rack-2:#fbfbfa;--rack-line:#c7c5bf;--rack-ink:#1d1c21;--rack-dim:#66626d;--led-off:#cfccc6;
  --paper:#ffffff;--wash:#f2f2f0;--line:#e2e1de;--ink:#18171c;--dim:#5e5a66;
  --link:#1b5fa8;--amber:#ffb000;--cta:#ffb000;--cta-ink:#18171c;--yes:#11804a;--no:#b3261e;
  --display:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;--mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--r:8px
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html{color-scheme:light}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 var(--body)}
a{color:var(--link)}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
.wrap{max-width:1100px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* ---------- header: rack unit ---------- */
.rack{background:linear-gradient(180deg,#f3f2ef,var(--rack));color:var(--rack-ink);border-bottom:1px solid var(--rack-line);color-scheme:light}
.rack-unit{max-width:1100px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:12px max(16px,env(safe-area-inset-right,0px)) 10px max(16px,env(safe-area-inset-left,0px));
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.35) 0 2px,rgba(0,0,0,.015) 2px 4px)}
.screw{flex:none;width:14px;height:14px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#ffffff,#a9a6a0 75%);box-shadow:inset 0 0 0 1px #8d8a84;position:relative}
.screw::after{content:"";position:absolute;left:3px;right:3px;top:6px;height:2px;background:#7d7a74;transform:rotate(-35deg)}
.brand{display:flex;align-items:center;gap:12px;color:var(--rack-ink);text-decoration:none}
.vu{display:flex;align-items:flex-end;gap:3px;height:26px;padding:4px 5px;background:#1d1c21;border-radius:4px;box-shadow:inset 0 0 0 1px #000}
.vu i{display:block;width:4px;border-radius:1px;background:linear-gradient(0deg,#39d98a 0 55%,var(--amber) 55% 80%,#ff4d3d 80%)}
.vu i:nth-child(1){height:45%}.vu i:nth-child(2){height:80%}.vu i:nth-child(3){height:100%}.vu i:nth-child(4){height:65%}.vu i:nth-child(5){height:35%}
.brand-name{font:800 24px/1 var(--display);letter-spacing:-.02em}
.brand-name small{font:600 12px/1 var(--mono);color:#b87900;margin-left:4px;letter-spacing:.12em;vertical-align:3px}
.rack-label{margin:0 0 0 auto;font:500 11.5px/1.3 var(--mono);color:var(--rack-dim);text-transform:uppercase;letter-spacing:.14em}
.rack-label span{margin:0 8px;color:var(--rack-line)}
.channels{max-width:1100px;margin:0 auto;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;
  padding:8px max(16px,env(safe-area-inset-right,0px)) 12px max(16px,env(safe-area-inset-left,0px))}
.channels::-webkit-scrollbar{display:none}
.ch{flex:none;display:flex;align-items:center;gap:8px;padding:7px 12px;border-radius:6px;background:var(--rack-2);border:1px solid var(--rack-line);box-shadow:0 1px 0 rgba(0,0,0,.06);
  color:var(--rack-ink);text-decoration:none;font:600 12.5px/1 var(--mono);text-transform:uppercase;letter-spacing:.06em;white-space:nowrap}
.ch i{width:7px;height:7px;border-radius:50%;background:var(--led-off)}
.ch:hover i,.ch.on i{background:var(--led);box-shadow:0 0 8px var(--led)}
.ch.on{border-color:var(--led);box-shadow:inset 0 0 0 1px var(--led)}
.ch:hover{border-color:#9d9a93}
.disc-bar{margin:0;padding:7px 16px;text-align:center;font:500 12px/1.5 var(--mono);color:var(--dim);background:var(--wash);border-bottom:1px solid var(--line)}
.disc-bar a{color:var(--dim)}

/* ---------- body ---------- */
main{padding-block:22px 48px}
h1,h2,h3{font-family:var(--display);text-wrap:balance}
h1{font-size:clamp(30px,4.6vw,44px);font-weight:800;line-height:1.08;letter-spacing:-.025em;margin:8px 0 10px}
h2{font-size:clamp(23px,3vw,28px);font-weight:800;line-height:1.2;margin:44px 0 12px;letter-spacing:-.015em}
h3{font-size:20px;font-weight:600;line-height:1.3;margin:24px 0 8px}
.crumbs{font:500 12.5px/1.4 var(--mono);color:var(--dim);text-transform:uppercase;letter-spacing:.06em}
.crumbs a{color:var(--dim)}
.byline{font:500 12.5px/1.6 var(--mono);color:var(--dim);margin:0 0 18px}
.lede{font-size:18.5px;max-width:68ch}
.small{font-size:13px;color:var(--dim)}
.btn{display:inline-block;background:var(--cta);color:var(--cta-ink);font-weight:700;text-decoration:none;border-radius:6px;padding:10px 16px;white-space:nowrap;text-align:center;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.18)}
.btn:hover{filter:brightness(1.05)}
.btn.sm{padding:6px 10px;font-size:14px}
.toppick{display:grid;grid-template-columns:88px 1fr auto;gap:14px;align-items:center;border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;margin:6px 0 18px;background:var(--wash)}
.toppick img{background:#fff;border-radius:6px;object-fit:contain;width:88px;height:88px}
.eyebrow{margin:0;font:600 11.5px/1.3 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--dim)}
.eyebrow::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--amber);box-shadow:0 0 6px var(--amber);margin-right:7px;vertical-align:1px}
.tp-name{margin:3px 0;font-weight:700;line-height:1.3}
.tp-score{margin:0;font:500 13px/1.4 var(--mono);color:var(--dim)}
.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
thead th{background:var(--wash);font:600 11.5px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--dim)}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
.cmp td{white-space:nowrap;font-family:var(--mono);font-size:13.5px}
.cmp tbody th{white-space:normal;min-width:170px}
td.ns{color:var(--dim);font-style:italic}
.who li{margin-bottom:8px}
.pick{border-top:2px solid var(--ink);margin-top:36px;padding-top:16px;scroll-margin-top:16px}
.badge{display:flex;align-items:center;gap:10px;margin:0 0 12px;font:600 12px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink)}
.badge span{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#1d1c21;color:var(--amber);font:600 14px/1 var(--mono);letter-spacing:0}
.pick-row{display:grid;grid-template-columns:220px minmax(0,1fr);gap:22px;align-items:start}
.shot{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:10px}
.shot img{display:block;width:100%;height:200px;object-fit:contain}
.pick h3{margin:0 0 10px;font-size:21px}
.pick h3 a,a.plink{color:var(--link);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:color-mix(in srgb,var(--link) 35%,transparent)}
.pick h3 a:hover,a.plink:hover{text-decoration-color:var(--link)}
.pick h3 a::after,a.plink::after{content:" ↗";font-size:.8em;text-decoration:none;display:inline-block;margin-left:2px}
.checks{list-style:none;padding:0;margin:0 0 14px;font-size:15px}
.checks li{padding-left:24px;position:relative;margin:3px 0}
.checks li.yes::before{content:"✓";position:absolute;left:0;color:var(--yes);font-weight:800}
.checks li.no{color:var(--dim)}
.checks li.no::before{content:"✗";position:absolute;left:0;color:var(--no);font-weight:800}
.pick-cta{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.scorebox{display:inline-flex;flex-direction:column;align-items:center;gap:4px}
.scorebox small{font:600 10.5px/1 var(--mono);color:var(--dim);text-transform:uppercase;letter-spacing:.08em}
.score{display:inline-grid;place-items:center;width:64px;height:64px;border-radius:50%;font:600 19px/1 var(--mono);
  background:radial-gradient(closest-side,var(--paper) 78%,transparent 80% 100%),conic-gradient(var(--amber) calc(var(--s)*1%),var(--line) 0)}
.verdict{font-weight:700;font-size:18px;margin:16px 0 8px}
.fit{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.fit h4{margin:6px 0 4px;font:600 12px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--dim)}
.fit ul{margin:0;padding-left:20px;font-size:15.5px}
.weights{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0}
.weights li{border:1px solid var(--line);border-radius:999px;padding:4px 12px;font:500 13px/1.4 var(--mono)}
.weights span{color:var(--dim)}
.related li{margin:6px 0}

/* ---------- post: cột chính + mục lục bám theo (desktop) ---------- */
.post-grid{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:44px;align-items:start}
.toc{position:sticky;top:16px;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;background:var(--wash);font-size:14.5px}
.toc-title{margin:0 0 8px;font:600 11.5px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--dim)}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.toc a{display:flex;gap:8px;align-items:center;padding:5px 6px;border-radius:6px;color:var(--ink);text-decoration:none;line-height:1.3}
.toc a:hover{background:var(--paper)}
.toc-pick a{padding-left:14px;font-size:14px}
.toc-pick span{flex:none;display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#1d1c21;color:var(--amber);font:600 11px/1 var(--mono)}

/* ---------- home / category ---------- */
.hero{padding-block:16px 4px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);column-gap:48px;align-items:end}
.hero .eyebrow{grid-column:1/-1}
.hero h1{margin-bottom:0}
.hero h1{max-width:20ch}
.hero p.hero-p{font-size:18px;color:var(--dim);max-width:62ch;margin:0 0 6px}
.cats{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.cats a{height:100%;box-sizing:border-box;display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;text-decoration:none;color:var(--ink)}
.cats a i{flex:none;width:9px;height:9px;border-radius:50%;background:var(--led);box-shadow:0 0 0 3px color-mix(in srgb,var(--led) 22%,transparent)}
.cats a:hover{border-color:var(--ink)}
.cats b{display:block;line-height:1.25;font-weight:650}
.c-txt{min-width:0}
.cats .c-txt>span{display:block;font:500 12px/1.4 var(--mono);color:var(--dim)}
.cards{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.cards a{height:100%;box-sizing:border-box;display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:var(--r);padding:10px;text-decoration:none;color:var(--ink)}
.cards a:hover{border-color:var(--ink)}
.cards img{width:84px;height:84px;object-fit:contain;background:#fff;border-radius:6px;flex:none}
.cards span{min-width:0}
.cards b{display:block;line-height:1.3}
.cards small{display:block;margin-top:4px;font:500 12px/1.45 var(--mono);color:var(--dim)}

/* ---------- footer: patch bay ---------- */
.bay{background:linear-gradient(180deg,var(--rack),#dedcd7);color:var(--rack-ink);margin-top:24px;border-top:1px solid var(--rack-line)}
.bay-in{max-width:1100px;margin:0 auto;padding:22px max(16px,env(safe-area-inset-right,0px)) 26px max(16px,env(safe-area-inset-left,0px))}
.bay-title{margin:0 0 12px;font:600 11.5px/1 var(--mono);text-transform:uppercase;letter-spacing:.18em;color:var(--rack-dim)}
.jacks{list-style:none;margin:0;padding:12px;display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:12px 8px;
  background:var(--rack-2);border:1px solid var(--rack-line);border-radius:6px}
.jacks + .jacks{margin-top:10px}
.jacks a{display:flex;flex-direction:column;align-items:center;gap:7px;text-decoration:none;color:var(--rack-ink);font:500 11.5px/1.25 var(--mono);text-align:center;text-transform:uppercase;letter-spacing:.04em}
.jacks i{width:22px;height:22px;border-radius:50%;background:radial-gradient(circle,#111 0 34%,#8e8b85 36% 58%,#d8d6d0 60%);box-shadow:0 0 0 2px var(--led,#a9a6a0)}
.jacks a:hover i{box-shadow:0 0 0 2px var(--led,var(--amber)),0 0 10px var(--led,var(--amber))}
.jacks-alt i{--led:#a9a6a0}
.bay-foot{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:12px 24px;margin-top:18px;font-size:14px;color:var(--rack-dim)}
.bay-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px 22px}
.bay-links a{font:600 12px/1.4 var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--rack-ink);text-decoration:none;border-bottom:1px solid transparent}
.bay-links a:hover{border-bottom-color:var(--rack-ink)}
.bay-note{grid-column:1/-1;padding-top:12px;border-top:1px solid var(--rack-line)}
.bay-foot p{margin:0}
.bay-brand{font:800 20px/1 var(--display);color:var(--rack-ink)}
.bay-brand small{font:600 11px/1 var(--mono);color:#b87900;margin-left:3px;letter-spacing:.12em}
.bay-legal{grid-column:1/-1;font:500 11.5px/1.5 var(--mono)}

@media (max-width:980px){
  .post-grid{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .cats{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:680px){
  .hero{grid-template-columns:1fr}
  .hero p.hero-p{margin-top:14px}
  .cats{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .cats a{padding:10px 12px;gap:10px}
  .cards{grid-template-columns:1fr}
  .cards img{width:72px;height:72px}
  .glance .btn.sm{font-size:12.5px;padding:6px 8px}
  .glance td,.glance th{padding:9px 8px}
  body{font-size:16.5px}
  .rack-label{display:none}
  .rack-unit .screw:last-child{margin-left:auto}
  .toppick{grid-template-columns:64px 1fr}
  .toppick img{width:64px;height:64px}
  .toppick .btn{grid-column:1/-1}
  .pick-row{grid-template-columns:1fr}
  .shot{max-width:none}
  .fit,.bay-foot{grid-template-columns:1fr}
  .glance th:nth-child(2),.glance td:nth-child(2){display:none}
  .jacks{grid-template-columns:repeat(5,minmax(0,1fr));padding:12px 6px;gap:14px 2px}
  .jacks a{font-size:10px;letter-spacing:0}
  .bay-links{justify-content:space-between;grid-column:1/-1;gap:6px 10px}
  .bay-links a{font-size:10.5px;letter-spacing:.02em}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
main > .post{max-width:806px}
.disc{margin:-8px 0 16px;padding:8px 12px;border-left:3px solid var(--amber);background:var(--wash);border-radius:0 6px 6px 0;font-size:14.5px;line-height:1.5;color:var(--ink)}
.disc a{color:var(--link)}

/* ---------- nhóm (23/10: 21 loại hàng, menu 5 nhóm) ---------- */
.channels{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));overflow:visible}
.ch{justify-content:center}
.racks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.rk ul{grid-template-columns:1fr 1fr;column-gap:14px}
.rk{background:var(--rack-2,#f7f6f3);border:1px solid var(--rack-line);border-radius:8px;padding:12px 14px}
.rk-head{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--rack-ink);font:600 12px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.rk-head i,.grp-head i,.chips i{flex:none;width:14px;height:14px;border-radius:50%;background:radial-gradient(circle,#111 0 34%,#8e8b85 36% 58%,#d8d6d0 60%);box-shadow:0 0 0 2px var(--led)}
.rk ul{list-style:none;margin:0;padding:0;display:grid;gap:3px}
.rk ul a{color:var(--rack-ink);text-decoration:none;font-size:14px}
.rk ul a:hover{text-decoration:underline}
.groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.grp{border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.grp-head{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;font-size:18px;line-height:1.2;color:var(--ink);text-decoration:none;margin-bottom:10px}
.grp ul{list-style:none;margin:0;padding:0;display:grid;gap:4px;font-size:15px}
.grp li{display:flex;justify-content:space-between;gap:8px}
.grp li a{color:var(--ink);text-decoration:none}
.grp li a:hover{text-decoration:underline}
.grp li span{font:500 12px/1.9 var(--mono);color:var(--dim)}
.chips{list-style:none;padding:0;margin:10px 0 8px;display:flex;flex-wrap:wrap;gap:8px}
.chips a{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:6px 12px;text-decoration:none;color:var(--ink);font-size:14.5px}
.chips a span{font:500 12px/1 var(--mono);color:var(--dim)}
.chips i{width:10px;height:10px}
.gsec-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.gsec-head a{font:600 13px/1.4 var(--mono)}
@media (max-width:980px){.groups,.racks{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:680px){
  .channels{grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}
  .ch{padding:7px 4px;font-size:10.5px;letter-spacing:.02em;gap:5px}
  .ch i{width:6px;height:6px}
  .groups,.racks{grid-template-columns:1fr}
  .grp ul,.rk ul{grid-template-columns:1fr 1fr;column-gap:14px}
}
/* 24/10: 8 nhóm, lưới 4 cột đều nhau; mỗi thẻ tối đa 8 loại (code chọn loại nhiều bài nhất), dòng "guides →" ghim đáy thẻ */
.groups{grid-template-columns:repeat(4,minmax(0,1fr))}
.grp{display:flex;flex-direction:column;padding:14px 16px 12px}
.grp-head{font-size:17px;min-height:2.4em}
.grp ul{gap:5px;font-size:14.5px;flex:1}
.grp li a{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.grp li span{flex:none;font:500 12px/1.6 var(--mono);color:var(--muted,#6b6a66)}
.grp-all{margin-top:12px;padding-top:10px;border-top:1px dashed var(--line);font:600 12px/1.3 var(--mono);color:var(--ink);text-decoration:none;letter-spacing:.02em}
.grp-all:hover{text-decoration:underline}
.racks{grid-template-columns:repeat(4,minmax(0,1fr))}
.rk{display:flex;flex-direction:column}
.rk ul{grid-template-columns:1fr;flex:1}
.rk-more{margin-top:8px;font:600 11px/1.3 var(--mono);color:var(--rack-dim);text-decoration:none;text-transform:uppercase;letter-spacing:.06em}
.rk-more:hover{color:var(--rack-ink)}
@media (max-width:980px){.groups,.racks{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.groups{grid-template-columns:minmax(0,1fr)}.grp ul{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:16px}.grp li{min-width:0}.grp-head{min-height:0}.racks{grid-template-columns:1fr 1fr}}
/* 24/10 tối: hàng nút nhóm 8 cột đều (desktop), thẻ nhóm không giãn dòng, điện thoại bỏ số đếm cho tên không bị cắt */
.grp ul{align-content:start}
.grp-all{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media (min-width:981px){.channels{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));overflow:visible}.ch{justify-content:center;padding:7px 6px;min-width:0;white-space:nowrap;overflow:hidden}}
@media (max-width:560px){.grp li span{display:none}.grp ul{column-gap:12px}.grp li a{font-size:14px}}
@media (max-width:980px){.channels{grid-template-columns:repeat(4,minmax(0,1fr))}.ch{white-space:nowrap;overflow:hidden;min-width:0}}
@media (max-width:680px){.bay-links{display:grid;grid-template-columns:repeat(3,auto);justify-content:space-between;gap:8px 10px}}
/* 24/10: trang chính sách/giới thiệu (không có mục lục bên phải) căn giữa khung, không dồn trái */
main > .post{max-width:760px;margin-left:auto;margin-right:auto}
/* 25/10: link nội bộ + giữ khách (sếp duyệt): link ngữ cảnh, bài gốc <-> bài con, đồ đi kèm, thanh nút Amazon dính đáy (điện thoại) */
.who .also{display:block;font-size:14px;color:var(--dim);margin-top:2px}
.narrow{border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin:18px 0 6px;background:var(--wash)}
.narrow-h{margin:0 0 8px;font:600 12px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--dim)}
.narrow ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.narrow li a{display:inline-block;padding:5px 11px;border:1px solid var(--line);border-radius:999px;background:var(--paper);font-size:14.5px;text-decoration:none;color:var(--link)}
.narrow li a:hover{border-color:var(--link)}
.narrow-all{display:inline-block;margin-top:10px;font:600 13px/1.3 var(--mono);color:var(--ink)}
.hubline{font-size:15.5px;color:var(--dim);border-left:3px solid var(--amber);padding:2px 0 2px 12px;margin:16px 0}
.pairs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:8px 0 18px}
.pair{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:10px;text-decoration:none;color:var(--ink);min-width:0}
.pair:hover{border-color:var(--link)}
.pair img{width:64px;height:64px;object-fit:contain;flex:none;background:#fff}
.pair span{display:flex;flex-direction:column;min-width:0}
.pair b{font-size:15px;line-height:1.3;color:var(--link)}
.pair small{font-size:13px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stickybar{display:none}
@media (max-width:720px){
  .pairs{grid-template-columns:1fr}
  .stickybar:not([hidden]){display:flex;position:fixed;left:0;right:0;bottom:0;z-index:50;gap:10px;align-items:center;justify-content:space-between;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--line);box-shadow:0 -4px 14px rgba(0,0,0,.08)}
  .sb-name{min-width:0;font-size:14px;font-weight:600;line-height:1.3;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
  .sb-name small{display:block;font:600 10.5px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--dim)}
}
/* 25/10 sếp: cột phải dưới mục lục trống -> thẻ #1 pick đi theo khi cuộn (chỉ máy tính; điện thoại đã có thanh dính đáy) */
.side{position:sticky;top:16px;display:grid;gap:14px}
.side .toc{position:static}
.sidepick{border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;background:var(--paper);text-align:center}
.sidepick .toc-title{text-align:left}
.sp-shot img{width:140px;height:140px;object-fit:contain;display:block;margin:2px auto 8px}
.sp-name{margin:0 0 4px;font-weight:700;font-size:14.5px;line-height:1.35}
.sp-score{margin:0 0 10px;font:500 12px/1.3 var(--mono);color:var(--dim)}
.sidepick .btn{display:block}
.sp-more{list-style:none;margin:12px 0 0;padding:10px 0 0;border-top:1px dashed var(--line);text-align:left;display:grid;gap:4px}
.sp-more a{display:flex;gap:8px;font-size:13px;line-height:1.35;color:var(--ink);text-decoration:none}
.sp-more a:hover{text-decoration:underline}
.sp-more span{flex:none;display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:#1d1c21;color:var(--amber);font:600 10px/1 var(--mono)}
@media (max-width:980px){.side{display:none}}
/* màn hình thấp: thu thẻ #1 pick cho mục lục + thẻ không cao quá màn hình (sticky cao hơn màn hình sẽ khuất đáy) */
@media (min-width:981px) and (max-height:880px){.sp-more{display:none}.sp-shot img{width:96px;height:96px}.toc a{padding:3px 6px}}
@media (min-width:981px) and (max-height:720px){.sidepick{display:none}}

/* 11/11 byline tác giả + trang /author/ */
.by-author{display:inline-flex;align-items:center;gap:6px;color:var(--ink);font-weight:700;text-decoration:none;vertical-align:middle}
.by-author img{width:24px;height:24px;border-radius:50%;object-fit:cover;border:1px solid var(--line)}
.author-hero{display:flex;gap:22px;align-items:center;margin:8px 0 26px}
.author-hero img{width:120px;height:120px;border-radius:50%;object-fit:cover;flex:none;border:1px solid var(--line)}
.author-hero h1{margin:0 0 8px}
.author-hero p{margin:0 0 6px}
.author-list{list-style:none;padding:0;margin:0}
.author-list li{padding:14px 0;border-bottom:1px solid var(--line)}
.author-list a{font-weight:700}
.author-list p{margin:4px 0 0;color:var(--dim);font-size:15px}
.author-pager{display:flex;justify-content:space-between;margin:22px 0;font:500 13px/1.4 var(--mono)}
@media(max-width:600px){.author-hero{flex-direction:column;align-items:flex-start}.author-hero img{width:96px;height:96px}}

/* 11/11 /tools/ */
.tool-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin:18px 0}
.tool-card{display:block;padding:18px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);text-decoration:none}
.tool-card:hover{border-color:var(--amber)}
.tool-card strong{display:block;font-size:19px;margin-bottom:6px;color:var(--link)}
.tool-card span{font-size:15px;color:var(--dim)}
.tool-box{border:1px solid var(--line);border-radius:10px;background:var(--wash);padding:18px;margin:16px 0}
.tool-box label{display:flex;flex-direction:column;gap:4px;font:600 13px/1.4 var(--mono);color:var(--dim)}
.tool-box input,.tool-box select{font:600 18px/1.3 var(--body);padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);max-width:220px}
.tool-row{display:flex;flex-wrap:wrap;gap:14px}
.tool-result{font-size:18px;margin:14px 0 0}
.tool-result small,.tool-table small{color:var(--dim);font-size:13px}
.tool-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:15px}
.tool-table th,.tool-table td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}
.tool-table td small{display:block}
.tool-table .str{display:inline-block;margin:0 14px 4px 0}
.tool-links{columns:2;padding-left:18px}
.tool-links small{color:var(--dim)}
.tool-cta{border:1px solid var(--line);border-left:4px solid var(--amber);border-radius:8px;padding:12px 16px;margin:22px 0;background:var(--wash)}
.tool-cta a{display:block;font-weight:700;font-size:18px}
.tool-cta p{margin:2px 0 0;font-size:15px;color:var(--dim)}
@media(max-width:600px){.tool-links{columns:1}.tool-table{font-size:14px}.tool-box input,.tool-box select{max-width:100%}}