/* Trang hướng dẫn eLead / Agency — THACO UI (trắng / nhôm / graphite + line xanh) */
:root{--bg:#f4f5f7;--card:#fff;--ink:#1f2328;--mut:#6b7178;--concrete:#a9aeb4;--alu:#d5d8dc;--alu-2:#e9ebee;--graphite:#3d4247;--line:#0a5bc4;--line-soft:#e8f0fb;--line-ink:#0a4ea8;--r:4px;color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#16191c;--card:#1e2226;--ink:#e7e9ec;--mut:#9aa1a8;--concrete:#6f767d;--alu:#343a40;--alu-2:#2a2f34;--graphite:#c9cdd2;--line:#4b8fe8;--line-soft:#1c2c42;--line-ink:#8ab6f2;color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 "Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--line-ink)}
.gtop{position:sticky;top:0;z-index:5;background:var(--card);border-bottom:2px solid var(--line);display:flex;align-items:center;gap:20px;padding:0 20px;min-height:56px;flex-wrap:wrap}
.gbrand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink)}
.gbrand picture{line-height:0}.gbrand .lg{height:32px;width:auto}.gbrand span{color:var(--mut);font-size:13px;border-left:1px solid var(--alu);padding-left:8px}
.gtop nav{display:flex;gap:2px;align-self:stretch}
.gtop nav a{display:flex;align-items:center;padding:0 12px;color:var(--mut);text-decoration:none;font-weight:500;border-bottom:2px solid transparent;margin-bottom:-2px}
.gtop nav a.on,.gtop nav a:hover{color:var(--ink);border-bottom-color:var(--line)}
.gwrap{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:230px minmax(0,1fr);gap:32px;padding:28px 20px 60px}
.gtoc{position:sticky;top:76px;align-self:start;display:flex;flex-direction:column;gap:2px;font-size:13px}
.gtoc a{color:var(--mut);text-decoration:none;padding:4px 10px;border-left:2px solid var(--alu)}
.gtoc a:hover{color:var(--ink);border-left-color:var(--line)}
.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--mut);margin:0 0 8px 12px}
.gmain{min-width:0;max-width:820px}
.gindex{margin:0 auto;padding:36px 20px 60px}
h1{font-size:26px;font-weight:600;color:var(--graphite);margin:0 0 20px}
h1::after{content:"";display:block;width:40px;height:2px;background:var(--line);margin-top:10px}
h2{font-size:19px;font-weight:600;color:var(--graphite);margin:36px 0 10px;padding-top:12px;border-top:1px solid var(--alu-2);scroll-margin-top:70px}
h3{font-size:15px;font-weight:600;margin:20px 0 6px;scroll-margin-top:70px}
p,ul,ol{margin:0 0 12px}
li{margin:3px 0}
code{font-family:ui-monospace,Consolas,monospace;font-size:13px;background:var(--alu-2);padding:1px 5px;border-radius:3px}
blockquote{margin:0 0 16px;padding:10px 14px;background:var(--line-soft);border-left:3px solid var(--line);border-radius:var(--r)}
.tw{overflow-x:auto;margin:0 0 16px;background:var(--card);border:1px solid var(--alu);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:8px 12px;border-bottom:1px solid var(--alu-2);text-align:left;vertical-align:top}
th{font-size:12px;color:var(--mut);font-weight:600;text-transform:uppercase;letter-spacing:.04em;background:var(--bg)}
tr:last-child td{border-bottom:0}
.gcards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:8px 0 20px}
.gcard{display:flex;flex-direction:column;gap:4px;background:var(--card);border:1px solid var(--alu);border-left:3px solid var(--line);border-radius:var(--r);padding:18px 20px;text-decoration:none;color:var(--ink)}
.gcard:hover{border-color:var(--line)}
.gcard .num{font-size:34px;line-height:1;font-weight:200;color:var(--concrete)}
.gcard b{font-size:17px}.gcard span:last-child{color:var(--mut);font-size:13px}
.hint{font-size:13px;color:var(--mut)}
.gfoot{text-align:center;color:var(--mut);font-size:12px;padding:20px;border-top:1px solid var(--alu-2)}
@media (max-width:860px){.gwrap{grid-template-columns:minmax(0,1fr);padding:18px 14px 50px}.gtoc{position:static;flex-direction:row;flex-wrap:wrap;gap:6px}.gtoc .eyebrow{display:none}.gtoc a{border:1px solid var(--alu);border-radius:14px;padding:2px 10px;background:var(--card)}h1{font-size:22px}}
@media (max-width:520px){.gtop{padding:0 12px;gap:8px}.gbrand span{display:none}}