:root{--g50:oklch(.97 .022 150);--g100:oklch(.93 .045 150);--g200:oklch(.86 .075 150);--g500:oklch(.62 .13 150);--g600:oklch(.55 .13 150);--g700:oklch(.45 .1 150);--g900:oklch(.3 .06 150);--c50:oklch(.965 .025 40);--c100:oklch(.92 .05 40);--c700:oklch(.52 .14 40);--h50:oklch(.975 .03 88);--h100:oklch(.94 .055 85);--h700:oklch(.5 .11 70);--b50:oklch(.965 .02 240);--b100:oklch(.92 .045 240);--b700:oklch(.45 .1 240);--ink:oklch(.22 .012 150);--ink7:oklch(.38 .012 150);--ink5:oklch(.55 .01 150);--ink2:oklch(.89 .006 150);--ink1:oklch(.95 .005 150);--bg:oklch(.985 .008 95)}
*{box-sizing:border-box}html,body{margin:0;background:var(--bg)}body{font-family:'Be Vietnam Pro',system-ui,sans-serif;color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--g600);text-decoration:none}a:hover{color:var(--g700)}button{font-family:inherit;cursor:pointer}
.w{max-width:1160px;margin:0 auto;padding:0 24px}
.nav{position:sticky;top:0;z-index:20;background:oklch(.985 .008 95 / .92);backdrop-filter:blur(12px);border-bottom:1px solid var(--ink1)}
.nav .w{display:flex;align-items:center;gap:28px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-size:19px;font-weight:800;letter-spacing:-.5px;color:var(--ink);white-space:nowrap}.logo em{font-style:normal;color:var(--g600)}
.links{display:flex;gap:22px;font-size:14.5px;font-weight:500}.links a{color:var(--ink7)}.links a.on{color:var(--g700);font-weight:700}
.cta{margin-left:auto;background:var(--g500);color:#fff;border:none;border-radius:12px;padding:10px 16px;font-size:14px;font-weight:700;white-space:nowrap}.cta:hover{filter:brightness(1.05);color:#fff}
.hero{padding:48px 0 28px}
.eb{font-size:12px;font-weight:800;letter-spacing:1.2px;color:var(--g600);text-transform:uppercase}
h1{font-size:44px;font-weight:800;letter-spacing:-1.4px;line-height:1.1;margin:10px 0 12px;max-width:640px;text-wrap:balance}
.lead{font-size:17px;color:var(--ink5);line-height:1.6;margin:0;max-width:560px}
.search{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--ink2);border-radius:16px;padding:0 16px;height:52px;max-width:520px;margin-top:24px;box-shadow:0 4px 16px rgba(40,60,50,.05)}
.search:focus-within{border-color:var(--g500);box-shadow:0 0 0 4px var(--g100)}
.search input{flex:1;border:none;outline:none;font-family:inherit;font-size:15px;background:transparent;min-width:0}
.search kbd{font-family:inherit;font-size:12px;color:var(--ink5);border:1px solid var(--ink2);border-radius:6px;padding:2px 7px}
.ph{position:relative;overflow:hidden;background:linear-gradient(150deg,oklch(.9 .05 var(--hue)),oklch(.97 .02 var(--hue)))}
.ph span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:rgba(0,0,0,.28)}
.feat{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:0;background:#fff;border:1px solid var(--ink1);border-radius:26px;overflow:hidden;margin-top:36px;box-shadow:0 8px 30px rgba(40,60,50,.06);cursor:pointer;transition:box-shadow .2s}
.feat:hover{box-shadow:0 14px 40px rgba(40,60,50,.1)}
.feat .ph{min-height:340px}
.feat .bd{padding:34px 34px 30px;display:flex;flex-direction:column}
.feat h2{font-size:28px;font-weight:800;letter-spacing:-.8px;line-height:1.2;margin:12px 0 12px;text-wrap:pretty}
.feat p{font-size:15.5px;line-height:1.6;color:var(--ink5);margin:0}
.meta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink5);flex-wrap:wrap}.meta i{width:3px;height:3px;border-radius:2px;background:var(--ink2)}
.read{margin-top:auto;padding-top:22px;display:flex;align-items:center;gap:12px}
.au{width:36px;height:36px;border-radius:18px;background:linear-gradient(135deg,var(--g500),var(--g700));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;white-space:nowrap}
.t-ph{background:var(--g100);color:var(--g700)}.t-hp{background:var(--c100);color:var(--c700)}.t-ml{background:var(--h100);color:var(--h700)}.t-cc{background:var(--b100);color:var(--b700)}
.bar{position:sticky;top:64px;z-index:15;background:oklch(.985 .008 95 / .94);backdrop-filter:blur(12px);margin-top:44px;border-bottom:1px solid var(--ink1)}
.bar .w{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;padding-top:12px;padding-bottom:12px}.bar .w::-webkit-scrollbar{display:none}
.cat{border:1px solid var(--ink2);background:#fff;border-radius:999px;padding:9px 16px;font-size:14px;font-weight:600;color:var(--ink7);white-space:nowrap;display:flex;align-items:center;gap:7px;transition:all .12s}
.cat:hover{border-color:var(--ink5)}.cat b{font-size:12px;font-weight:700;color:var(--ink5)}
.cat.on{background:var(--ink);border-color:var(--ink);color:#fff}.cat.on b{color:oklch(.8 .01 150)}
.sec{padding:36px 0 8px}
.sh{display:flex;align-items:flex-end;gap:16px;margin-bottom:18px}
.sh h3{margin:0;font-size:23px;font-weight:800;letter-spacing:-.6px}.sh p{margin:4px 0 0;font-size:14.5px;color:var(--ink5)}
.sh a{margin-left:auto;font-size:14px;font-weight:600;white-space:nowrap}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--ink1);border-radius:20px;overflow:hidden;display:flex;flex-direction:column;cursor:pointer;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(40,60,50,.09)}
.card .ph{aspect-ratio:16/9}
.card .bd{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h4{margin:0;font-size:17px;font-weight:700;letter-spacing:-.3px;line-height:1.35;text-wrap:pretty}
.card p{margin:0;font-size:14px;line-height:1.55;color:var(--ink5);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .meta{margin-top:auto;padding-top:6px}
.tpl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.tp{background:#fff;border:1px solid var(--ink1);border-radius:18px;padding:16px;display:flex;flex-direction:column;gap:10px}
.tp .h{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--ink7)}
.bub{background:oklch(.95 .02 240);border-radius:16px 16px 16px 4px;padding:11px 13px;font-size:13.5px;line-height:1.5;color:var(--ink);flex:1}
.copy{align-self:flex-start;border:1px solid var(--ink2);background:#fff;border-radius:10px;padding:7px 12px;font-size:13px;font-weight:600;color:var(--ink7);display:flex;align-items:center;gap:6px}
.copy.ok{border-color:var(--g500);background:var(--g50);color:var(--g700)}
.start{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.st{background:#fff;border:1px solid var(--ink1);border-radius:18px;padding:16px;display:flex;gap:12px;align-items:flex-start;cursor:pointer}
.st:hover{border-color:var(--g200)}
.st .n{width:30px;height:30px;border-radius:10px;background:var(--g100);color:var(--g700);font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.st b{display:block;font-size:14.5px;line-height:1.35}.st span{font-size:12.5px;color:var(--ink5)}
.app{margin:56px 0 0;background:linear-gradient(155deg,var(--g500),var(--g700));border-radius:28px;color:#fff;padding:36px;display:flex;align-items:center;gap:32px;position:relative;overflow:hidden}
.app:after{content:'';position:absolute;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.08);right:-80px;top:-120px}
.app h3{margin:0;font-size:26px;font-weight:800;letter-spacing:-.6px;line-height:1.2}.app p{margin:8px 0 0;font-size:15px;opacity:.92;line-height:1.55;max-width:460px}
.app .btns{display:flex;gap:10px;margin-left:auto;position:relative;z-index:1;flex-shrink:0}
.app button{border:none;border-radius:13px;padding:13px 18px;font-size:14.5px;font-weight:700;white-space:nowrap}
.foot{padding:40px 0 48px;font-size:13px;color:var(--ink5);display:flex;gap:16px;flex-wrap:wrap}
.empty{background:#fff;border:1px dashed var(--ink2);border-radius:20px;padding:40px;text-align:center;color:var(--ink5)}
@media(max-width:960px){.grid,.tpl{grid-template-columns:repeat(2,minmax(0,1fr))}.start{grid-template-columns:repeat(2,minmax(0,1fr))}.feat{grid-template-columns:1fr}.feat .ph{min-height:220px}.links{display:none}}
@media(max-width:620px){h1{font-size:32px}.grid,.tpl,.start{grid-template-columns:1fr}.feat .bd{padding:22px}.feat h2{font-size:22px}.app{flex-direction:column;align-items:flex-start;padding:26px}.app .btns{margin-left:0}.search kbd{display:none}}
/* GieoChữ: ảnh thật thay khung màu của bản thiết kế; lọc chủ đề/tìm bài bằng JS (không JS vẫn thấy đủ bài) */
.ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.logo img{width:28px;height:28px;border-radius:8px}
.card,.feat,.st{color:inherit}.card:hover,.feat:hover,.st:hover{color:inherit}
.card h4,.feat h2{color:var(--g700)}
.sh button{margin-left:auto;border:none;background:none;padding:0;font-size:14px;font-weight:600;color:var(--g600);white-space:nowrap}
.js .grid .an{display:none}.js .sec.mo .grid .an{display:flex}
.an-han{display:none!important}
.foot a{color:var(--ink5)}
.app .btns a{border-radius:13px;padding:13px 18px;font-size:14.5px;font-weight:700;white-space:nowrap}
.app .b1{background:#fff;color:var(--g700)}.app .b2{background:rgba(255,255,255,.16);color:#fff}
html:not(.js) .copy,html:not(.js) [data-xem]{display:none}