:root{--bg:#f4f5fb;--card:#fff;--tx:#12141f;--mu:#667085;--bd:#e4e6f0;--ac:#6d4aff;--ac2:#efeaff;--sh:0 10px 30px -12px rgba(60,40,160,.25)}
[data-theme=dark]{--bg:#0a0b14;--card:#14162a;--tx:#eef0fa;--mu:#98a0b8;--bd:#25284a;--ac:#9b87ff;--ac2:#241f52;--sh:0 10px 30px -12px rgba(0,0,0,.7)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.55 "Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--ac)}.wrap{max-width:1200px;margin:0 auto;padding:0 18px}.muted{color:var(--mu);font-size:14px}
.top{position:absolute;inset:0 0 auto 0;z-index:20}
.bar{display:flex;gap:10px;align-items:center;height:68px}.sp{flex:1}
.logo{font-weight:800;font-size:21px;text-decoration:none;color:#fff;letter-spacing:-.3px}
.lg{background:linear-gradient(135deg,#ffd36e,#ff7ac6);-webkit-background-clip:text;background-clip:text;color:transparent}
button,.btn{font:inherit;cursor:pointer;border-radius:12px;border:1px solid var(--bd);background:var(--card);color:var(--tx);padding:9px 15px;text-decoration:none;display:inline-block;transition:.15s}
button.ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25);color:#fff;white-space:nowrap;backdrop-filter:blur(8px)}
button.ghost:hover{background:rgba(255,255,255,.22)}
button.primary{background:linear-gradient(135deg,#6d4aff,#c04bff);border:0;color:#fff;font-weight:700;padding:11px 20px;box-shadow:0 8px 20px -8px #8b5cf6}
button.primary:hover{filter:brightness(1.1)}
input:focus,select:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:2px solid var(--ac);outline-offset:2px}

/* HERO */
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,#150d3a 0%,#2a1270 45%,#5a1d9a 100%);color:#fff;padding:120px 0 90px;text-align:center}
.glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;pointer-events:none}
.g1{width:460px;height:460px;background:#ff5ec4;top:-160px;left:-80px}.g2{width:520px;height:520px;background:#33c8ff;bottom:-260px;right:-120px;opacity:.4}
.hero:after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(#000,transparent 85%);pointer-events:none}
.hin{position:relative;z-index:2}
.pill{display:inline-block;font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25)}
.hero h1{margin:18px auto 10px;font-size:clamp(32px,6vw,58px);line-height:1.1;letter-spacing:-1.5px;max-width:820px}
.grad{background:linear-gradient(90deg,#ffd36e,#ff7ac6,#7ad7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:0 auto 28px;color:rgba(255,255,255,.82);font-size:18px}
.search{position:relative;max-width:680px;margin:0 auto;display:flex;align-items:center;gap:10px;background:#fff;color:#12141f;border-radius:18px;padding:6px 16px;box-shadow:0 20px 50px -12px rgba(0,0,0,.5)}
.search:focus-within{box-shadow:0 0 0 4px rgba(255,255,255,.35),0 20px 50px -12px rgba(0,0,0,.5)}
.search svg{color:#6d4aff;flex:none}
.search input{flex:1;border:0;background:transparent;padding:15px 4px;font-size:18px;color:#12141f;outline:0!important}
.search kbd{font:600 13px ui-monospace,monospace;border:1px solid #d5d8e5;border-bottom-width:2px;border-radius:6px;padding:1px 8px;color:#667085}

/* CATEGORIES */
main{margin-top:-34px;position:relative;z-index:3}
.chips{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:0 0 18px}
.chips button{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;padding:14px 16px;border-radius:16px;box-shadow:var(--sh);font-weight:600;border:2px solid transparent}
.chips button{position:relative;padding-left:64px;min-height:64px;justify-content:center}
.chips button i{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:11px;display:grid;place-items:center;font:800 13px ui-monospace,monospace;font-style:normal;color:#fff;background:var(--k,#6d4aff)}
.chips b{font-weight:700;font-size:15px;line-height:1.25}
.chips button[data-k=lap-trinh]{--k:#3b82f6}.chips button[data-k=marketing]{--k:#f97316}.chips button[data-k=giao-duc]{--k:#10b981}.chips button[data-k=viet-lach]{--k:#ec4899}.chips button[data-k=suc-khoe]{--k:#14b8a6}.chips button[data-k=tai-chinh-luat]{--k:#eab308}.chips button[data-k=khac]{--k:#8b5cf6}.chips button[data-k=""]{--k:#12141f}
.chips button.on i{background:rgba(255,255,255,.25)}
.chips small{opacity:.6;font-weight:500;font-size:13px;margin:0}
.chips button:hover{transform:translateY(-3px)}
.chips button.on{background:linear-gradient(135deg,#6d4aff,#c04bff);color:#fff;border-color:transparent}
.chips button.on small{opacity:.85}
.tools{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:6px 0 16px;padding:10px 14px;background:var(--card);border:1px solid var(--bd);border-radius:14px}
.seg{display:flex}.seg button{border-radius:0;margin-left:-1px;padding:6px 14px;background:transparent}.seg button:first-child{border-radius:10px 0 0 10px;margin:0}.seg button:last-child{border-radius:0 10px 10px 0}
.seg button.on{background:var(--ac);border-color:var(--ac);color:#fff}
.sel{font-size:14px;color:var(--mu)}select{padding:7px;border-radius:8px;border:1px solid var(--bd);background:var(--card);color:var(--tx)}
#result{margin-left:auto;font-weight:600}

/* CARDS */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px}
.card{--c:#6d4aff;position:relative;background:var(--card);border:1px solid var(--bd);border-radius:18px;padding:18px 18px 14px;display:flex;flex-direction:column;gap:9px;cursor:pointer;transition:.18s;overflow:hidden}
.card:before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--c)}
.card[data-c=lap-trinh]{--c:#3b82f6}.card[data-c=marketing]{--c:#f97316}.card[data-c=giao-duc]{--c:#10b981}
.card[data-c=viet-lach]{--c:#ec4899}.card[data-c=suc-khoe]{--c:#14b8a6}.card[data-c=tai-chinh-luat]{--c:#eab308}.card[data-c=khac]{--c:#8b5cf6}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:var(--c)}
.card h3{margin:0;font-size:17px;line-height:1.3}
.card p{margin:0;color:var(--mu);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.tag{font-size:12px;font-weight:600;background:color-mix(in srgb,var(--c) 14%,transparent);color:var(--c);border-radius:8px;padding:3px 10px;align-self:flex-start}
.row{display:flex;gap:8px;align-items:center;justify-content:space-between;margin-top:4px}
.row button{padding:7px 14px;font-size:14px;font-weight:600}
.row button[data-act=copy]{background:var(--c);border-color:var(--c);color:#fff}
.row button[data-act=copy]:hover{filter:brightness(1.1)}
.fav{font-size:18px;padding:4px 12px!important}.fav.on{color:#e11d48;border-color:#e11d48}
mark{background:#fde68a;color:#222;border-radius:3px;padding:0 1px}
.more{display:block;margin:28px auto;padding:13px 34px;font-weight:700;border-radius:14px}
.empty{padding:50px;text-align:center;color:var(--mu)}
.foot{padding:20px}

/* MODAL */
.modal{position:fixed;inset:0;background:rgba(10,8,30,.65);backdrop-filter:blur(6px);z-index:50;display:flex;align-items:center;justify-content:center;padding:14px}
.modal[hidden]{display:none}
.sheet{background:var(--card);border-radius:22px;width:min(800px,100%);max-height:94vh;display:flex;flex-direction:column;padding:22px;gap:12px;box-shadow:0 30px 80px -20px #000;border:1px solid var(--bd)}
.sheet header{display:flex;justify-content:space-between;gap:10px}.sheet h2{margin:0;font-size:22px}
.sheet header .ghost{background:var(--bg);color:var(--tx);border-color:var(--bd)}
.sheet textarea{flex:1;min-height:220px;resize:vertical;border:1px solid var(--bd);border-radius:12px;padding:14px;background:var(--bg);color:var(--tx);font:14px/1.6 ui-monospace,Menlo,monospace}
.sheet footer{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.sheet footer .ghost{background:var(--bg);color:var(--tx);border-color:var(--bd)}
.vars{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:8px;padding:12px;border-radius:12px;background:var(--ac2)}
.vars label{font-size:13px;font-weight:600;color:var(--ac);display:flex;flex-direction:column;gap:3px}
.vars input{padding:9px;border:1px solid var(--bd);border-radius:8px;background:var(--card);color:var(--tx)}
.opt{font-size:14px;color:var(--mu)}
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);background:#12141f;color:#fff;padding:11px 20px;border-radius:999px;z-index:99;box-shadow:0 10px 30px rgba(0,0,0,.4)}
@media(max-width:640px){.hero{padding:96px 0 70px}.hero p{font-size:16px}.chips{grid-template-columns:repeat(2,1fr)}.chips button{padding-left:58px}.sheet{max-height:100vh}.sheet footer>*{flex:1 1 45%;text-align:center}.search kbd{display:none}#result{margin-left:0}}

/* LANG SWITCH */
.lang{display:flex;border:1px solid rgba(255,255,255,.25);border-radius:12px;overflow:hidden;background:rgba(255,255,255,.12);backdrop-filter:blur(8px)}
.lang button{border:0;border-radius:0;background:transparent;color:#fff;padding:8px 12px;font-size:14px;white-space:nowrap}
.lang button.on{background:#fff;color:#2a1270;font-weight:700}
.nov{display:inline-block;font-size:12px;color:var(--mu);margin-left:6px}
@media(max-width:560px){.lang button{padding:7px 9px;font-size:13px}.logo{font-size:18px}.bar{gap:6px}}
.vars[hidden]{display:none}
@media(max-width:560px){
 .bar{height:60px;gap:6px}
 .logo{white-space:nowrap;font-size:17px}
 .lang button{font-size:0;padding:7px 11px;min-width:40px}
 .lang button:after{font-size:13px;font-weight:700}
 .lang button[data-l=vi]:after{content:"VI"}.lang button[data-l=en]:after{content:"EN"}
 #favBtn{padding:8px 10px}
 #favBtn [data-i=saved]{font-size:0}
 #favBtn [data-i=saved]:before{content:"♥";font-size:16px}
 #themeBtn{padding:8px 11px}
}
@media(max-width:560px){
 .chips{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
 .chips button{padding:10px 8px 10px 52px;min-height:58px}
 .chips button i{left:9px;width:32px;height:32px}
 .chips b{font-size:14px;overflow-wrap:anywhere}
 .lang{flex:none}.lang button{padding:7px 9px;min-width:36px}
 #favBtn,#themeBtn{flex:none}
}
@media(max-width:400px){.logo{font-size:15px}.lg{display:none}.bar{gap:5px}.hero h1{font-size:30px}}
/* Header cố định khi cuộn */
.top{position:fixed;inset:0 0 auto 0;transition:background .2s,box-shadow .2s,backdrop-filter .2s}
.top.stuck{background:rgba(26,12,70,.92);backdrop-filter:blur(12px);box-shadow:0 6px 24px -8px rgba(0,0,0,.45)}
html{scroll-padding-top:76px}
.chips b{overflow-wrap:normal;word-break:normal;hyphens:none}
@media(max-width:560px){.chips b{font-size:13px}}