:root{
  --bg:#f6f4ef; --card:#fff; --ink:#1f2937; --muted:#6b7280; --line:#e5e1d8;
  --brand:#0f766e; --brand-d:#0b5a54; --brand-l:#e3f4f1;
  --good:#15803d; --good-l:#e4f5e8; --mid:#b45309; --mid-l:#fdf0d9; --bad:#b91c1c; --bad-l:#fbe6e6;
  --radius:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
h1,h2,h3{margin:0;line-height:1.25}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--brand)}
[hidden]{display:none!important}

/* khung chung */
.wrap{max-width:1100px;margin:0 auto;padding:0 16px 80px}
.topbar{background:var(--brand);color:#fff;position:sticky;top:0;z-index:20}
.topbar .in{max-width:1100px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:12px;justify-content:space-between}
.brand{font-weight:700;font-size:18px}
.who{font-size:14px;opacity:.95;display:flex;gap:10px;align-items:center}
.who button{background:rgba(255,255,255,.18);border:0;color:#fff;border-radius:8px;padding:6px 10px;cursor:pointer}
.tabs{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:50px;z-index:19}
.tabs .in{max-width:1100px;margin:0 auto;display:flex;overflow-x:auto}
.tab{flex:1 0 auto;padding:13px 16px;border:0;background:none;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:3px solid transparent;white-space:nowrap}
.tab.on{color:var(--brand);border-bottom-color:var(--brand)}
.pagehead{margin:20px 0 14px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}
.pagehead h2{font-size:22px}
.hint{color:var(--muted);font-size:14px}

/* nút */
.btn{border:0;border-radius:10px;padding:11px 18px;font-weight:600;cursor:pointer;background:var(--brand);color:#fff}
.btn:hover{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn.ghost:hover{background:var(--brand-l)}
.btn.danger{background:#fff;color:var(--bad);border:1.5px solid var(--bad)}
.btn.small{padding:7px 12px;font-size:14px}
.btn:disabled{opacity:.55;cursor:wait}

/* đăng nhập */
.login{max-width:420px;margin:8vh auto 0;background:#fff;border-radius:var(--radius);padding:28px 24px;box-shadow:0 6px 24px rgba(0,0,0,.08)}
.login h1{font-size:24px;margin-bottom:6px}
.login p{color:var(--muted);margin:0 0 18px}

/* form */
label.f{display:block;margin-bottom:14px}
label.f>span{display:block;font-weight:600;font-size:14px;margin-bottom:5px}
label.f small{display:block;color:var(--muted);font-size:13px;margin-top:4px}
input[type=text],input[type=number],input[type=password],input[type=url],select,textarea{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fff;min-height:44px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-l)}
textarea{min-height:90px;resize:vertical}
.err{color:var(--bad);font-size:14px;margin:8px 0;min-height:1em}

/* thanh lọc */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.filters select,.filters input{width:auto;flex:1 1 150px}

/* danh sách sách */
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:10px}
.card .top{display:flex;gap:12px;align-items:flex-start}
.ring{flex:0 0 58px;height:58px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:20px;border:4px solid}
.ring.good{border-color:var(--good);color:var(--good);background:var(--good-l)}
.ring.mid{border-color:var(--mid);color:var(--mid);background:var(--mid-l)}
.ring.bad{border-color:var(--bad);color:var(--bad);background:var(--bad-l)}
.card h3{font-size:17px;word-break:break-word}
.meta{color:var(--muted);font-size:13px;margin-top:2px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:12.5px;padding:3px 9px;border-radius:99px;background:#eef0f2;color:#374151;font-weight:600}
.tag.good{background:var(--good-l);color:var(--good)}
.tag.mid{background:var(--mid-l);color:var(--mid)}
.tag.bad{background:var(--bad-l);color:var(--bad)}
.tag.brand{background:var(--brand-l);color:var(--brand-d)}
.nums{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;font-size:13px}
.nums div{background:#f8f7f3;border-radius:8px;padding:7px 9px}
.nums b{display:block;font-size:15px}
.reasons{margin:0;padding-left:18px;font-size:14px}
.reasons li{margin:2px 0}
.card .acts{display:flex;gap:8px;margin-top:auto;flex-wrap:wrap}
.empty{background:#fff;border:2px dashed var(--line);border-radius:var(--radius);padding:36px 20px;text-align:center;color:var(--muted)}
.empty b{display:block;color:var(--ink);font-size:18px;margin-bottom:6px}

/* hộp thoại */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.5);z-index:50;display:flex;align-items:flex-start;justify-content:center;overflow-y:auto;padding:16px}
.sheet{background:#fff;border-radius:var(--radius);width:100%;max-width:720px;margin:auto;padding:0}
.sheet .hd{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:#fff;border-radius:var(--radius) var(--radius) 0 0;z-index:2}
.sheet .bd{padding:18px 20px}
.sheet .ft{padding:14px 20px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:space-between;position:sticky;bottom:0;background:#fff;border-radius:0 0 var(--radius) var(--radius)}
.x{border:0;background:none;font-size:26px;line-height:1;cursor:pointer;color:var(--muted)}
.sec{font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--brand-d);font-weight:700;margin:6px 0 10px;padding-top:6px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
@media (max-width:560px){.two{grid-template-columns:1fr}}
.live{background:var(--brand-l);border-radius:12px;padding:12px 14px;margin:6px 0 14px;display:flex;gap:14px;align-items:center}
.live .ring{flex-basis:52px;height:52px;font-size:18px}
.live p{margin:0;font-size:14px}

/* bảng so sánh */
.tablewrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto}
table{border-collapse:collapse;width:100%;min-width:640px}
th,td{padding:11px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
th{background:#faf9f5;font-size:13px;color:var(--muted)}
tr:last-child td{border-bottom:0}
.bar{height:10px;border-radius:99px;background:#eceae3;overflow:hidden;min-width:90px}
.bar i{display:block;height:100%;background:var(--brand)}
td.num{font-variant-numeric:tabular-nums}

/* tra cứu */
.search{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.search input{flex:1 1 240px}
.links{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.link{display:block;text-decoration:none;color:inherit;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.link:hover{border-color:var(--brand);box-shadow:0 2px 10px rgba(15,118,110,.12)}
.link b{display:block;font-size:16px;color:var(--brand-d)}
.link span{font-size:13.5px;color:var(--muted)}
.guide{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-top:18px}
.guide h3{font-size:17px;margin-bottom:8px}
.guide ul{margin:0;padding-left:20px}
.guide li{margin:5px 0}

/* AI */
.note{background:var(--mid-l);border-radius:10px;padding:10px 14px;font-size:14px;color:#7c4a03;margin-bottom:14px}
.idea h3{font-size:17px}
.idea p{margin:4px 0;font-size:14.5px}

.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#111827;color:#fff;padding:11px 18px;border-radius:99px;z-index:99;font-size:14.5px;max-width:90vw}
.spin{display:inline-block;width:16px;height:16px;border:2.5px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:sp .7s linear infinite;vertical-align:-3px;margin-right:6px}
@keyframes sp{to{transform:rotate(360deg)}}

.g-good{color:var(--good)}.g-bad{color:var(--bad)}
td.good{color:var(--good);font-weight:600}td.bad{color:var(--bad);font-weight:600}
details.guide summary{outline:none}