/* Layout: một cột hẹp (form ưu tiên điện thoại), thanh đầu trang có tab Đăng ký / Quản trị; quản trị là bảng rộng cuộn ngang trong khung riêng. */
:root{
  --bg:#F6F3FB; --surface:#FFFFFF; --ink:#2B0F5C; --muted:#7048B0; --line:#DDD4EC;
  --accent:#6A2FB5; --accent-ink:#FFFFFF; --accent-soft:#EFE7FA;
  --ok:#1D7447; --ok-soft:#E1F3E8; --warn:#8F5B00; --warn-soft:#FFF0D1; --bad:#B3261E; --bad-soft:#FCE7E5;
  --font:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#150E24; --surface:#201634; --ink:#EEE5FF; --muted:#BDA6EE; --line:#3B2E5C;
  --accent:#B99CF2; --accent-ink:#150E24; --accent-soft:#2D2050;
  --ok:#62D69C; --ok-soft:#133121; --warn:#F2B84B; --warn-soft:#3A2C0F; --bad:#FF8F85; --bad-soft:#3C1816; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#150E24; --surface:#201634; --ink:#EEE5FF; --muted:#BDA6EE; --line:#3B2E5C;
  --accent:#B99CF2; --accent-ink:#150E24; --accent-soft:#2D2050;
  --ok:#62D69C; --ok-soft:#133121; --warn:#F2B84B; --warn-soft:#3A2C0F; --bad:#FF8F85; --bad-soft:#3C1816; color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.55;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0 48px}
.shell{max-width:760px;margin:0 auto}
.shell.wide{max-width:1080px}
h1,h2,h3,p,ul,dl,dd{margin:0}
h1{font-size:1.55rem;line-height:1.25;font-weight:700;text-wrap:balance}
h2{font-size:1.08rem;font-weight:700;text-wrap:balance}
h3{font-size:.95rem;font-weight:600}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}

.top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;padding-block:16px 12px}
.brand{font-weight:700;letter-spacing:.02em;display:flex;align-items:center;gap:10px}
.logos{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px 12px}
.logos img{display:block;width:auto}
.logo-cd{height:42px}.logo-lo{height:24px}
.org{font-size:.82rem;line-height:1.35;letter-spacing:.02em;max-width:230px;min-width:0}
.tabs{display:flex;gap:4px}
.tabs a{padding:6px 12px;border-radius:6px;color:var(--muted);text-decoration:none;font-weight:500}
.tabs a[aria-current="page"]{background:var(--accent-soft);color:var(--accent);font-weight:600}
.flag{background:var(--warn-soft);color:var(--warn);border:1px solid var(--warn);border-radius:6px;padding:8px 12px;font-size:.86rem;margin-bottom:20px}

.intro{display:grid;gap:12px;margin-bottom:20px}
.kicker{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
.legal{color:var(--muted);font-size:.9rem}
.gift{display:flex;flex-wrap:wrap;gap:6px 24px;padding:14px 16px;background:var(--accent-soft);border-radius:8px}
.gift b{font-size:1.25rem;color:var(--accent);font-variant-numeric:tabular-nums}
.gift span{color:var(--ink)}

.sec{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;margin-bottom:16px;display:grid;gap:16px}
.sec>header{display:grid;gap:2px}
.sec>header p{color:var(--muted);font-size:.9rem}
.locked{opacity:.45}
.lock-note{color:var(--muted);font-size:.9rem;margin-bottom:8px}

.q{display:grid;gap:8px}
.q>p{font-weight:600}
.opts{display:flex;gap:8px;flex-wrap:wrap}
.opt{position:relative}
.opt input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.opt span{display:block;padding:8px 20px;border:1.5px solid var(--line);border-radius:8px;font-weight:500;min-width:84px;text-align:center}
.opt input:checked+span{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:600}
.opt input:focus-visible+span{outline:3px solid var(--accent);outline-offset:2px}
.gate{border-radius:8px;padding:10px 14px;font-size:.92rem}
.gate.bad{background:var(--bad-soft);color:var(--bad);border:1px solid var(--bad)}
.gate.ok{background:var(--ok-soft);color:var(--ok);border:1px solid var(--ok)}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:grid;gap:4px;min-width:0}
.field>label,.lbl{font-weight:600;font-size:.9rem}
.field small{color:var(--muted);font-size:.8rem}
input[type=text],input[type=tel],select,textarea{width:100%;padding:10px 12px;background:var(--bg);border:1.5px solid var(--line);border-radius:8px;min-width:0}
textarea{resize:vertical;min-height:84px}
.invalid{border-color:var(--bad)!important}
.err{color:var(--bad);font-size:.84rem;font-weight:500}

.cats{display:grid;gap:10px}
.cat{border:1.5px solid var(--line);border-radius:10px;background:var(--surface)}
.cat.on{border-color:var(--accent)}
.cat-head{display:grid;grid-template-columns:22px 1fr;gap:12px;padding:14px;cursor:pointer;align-items:start}
.cat-head input{width:20px;height:20px;margin:2px 0 0;accent-color:var(--accent)}
.cat-title{font-weight:600;display:block}
.cat-desc{color:var(--muted);font-size:.88rem;display:block;margin-top:2px}
.cat-body{display:grid;gap:14px;padding:0 14px 16px 14px;border-top:1px dashed var(--line);padding-top:14px;margin-inline:14px;padding-inline:0}
.docs{background:var(--bg);border-radius:8px;padding:12px 14px;display:grid;gap:6px}
.docs ul{padding-left:18px;display:grid;gap:2px;font-size:.9rem}
.docs .rule{font-size:.84rem;color:var(--muted)}
.tag{display:inline-block;font-size:.76rem;font-weight:600;padding:2px 8px;border-radius:99px;background:var(--warn-soft);color:var(--warn);margin-right:6px}
.tag.copy{background:var(--accent-soft);color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:8px;border:1.5px solid var(--accent);background:transparent;color:var(--accent);font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--accent-soft)}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.sm{padding:5px 12px;font-size:.86rem}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.good{border-color:var(--ok);color:var(--ok)}
.btn.warnb{border-color:var(--warn);color:var(--warn)}
.btn.badb{border-color:var(--bad);color:var(--bad)}
.filebtn input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.filebtn{position:relative}
.filebtn:focus-within{outline:3px solid var(--accent);outline-offset:2px}
.files{list-style:none;padding:0;display:grid;gap:8px;margin-top:8px}
.files li{display:grid;grid-template-columns:48px 1fr auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:6px 8px}
.thumb{width:48px;height:48px;border-radius:6px;object-fit:cover;background:var(--bg);display:grid;place-items:center;font-size:.72rem;font-weight:700;color:var(--muted)}
.fname{min-width:0;overflow-wrap:anywhere;font-size:.88rem}
.fname small{display:block;color:var(--muted)}
.xbtn{background:none;border:0;color:var(--bad);cursor:pointer;font-weight:600;padding:6px}
.hint{color:var(--muted);font-size:.86rem}

.check{display:grid;grid-template-columns:22px 1fr;gap:12px;align-items:start;cursor:pointer}
.check input{width:20px;height:20px;margin:2px 0 0;accent-color:var(--accent)}
.submit-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

.done{display:grid;gap:14px;justify-items:start}
.sum{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;margin:0}
.sum dt{color:var(--muted)}
.sum dd{margin:0;font-weight:600;overflow-wrap:anywhere}
.shot{background:var(--accent-soft);color:var(--accent);border:1.5px solid var(--accent);border-radius:8px;padding:12px 16px;font-weight:600}
.code{font-size:1.6rem;font-weight:700;letter-spacing:.06em;font-variant-numeric:tabular-nums;color:var(--ok);background:var(--ok-soft);padding:6px 16px;border-radius:8px}

/* admin */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:8px 14px;border-radius:8px;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;font-weight:500;display:flex;gap:8px;align-items:baseline}
.chip b{font-variant-numeric:tabular-nums}
.chip[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}
.bar{display:flex;flex-wrap:wrap;gap:10px;align-items:end;margin-block:14px}
.bar .field{flex:1 1 200px}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
table{width:100%;border-collapse:collapse;min-width:760px}
th{font-size:.76rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:12px;border-bottom:1px solid var(--line);vertical-align:top}
tr.row:hover td{background:var(--bg)}
tr.detail td{background:var(--bg)}
.mono{font-variant-numeric:tabular-nums}
.pill{display:inline-block;padding:2px 10px;border-radius:99px;font-size:.8rem;font-weight:600;white-space:nowrap}
.s-new{background:var(--accent-soft);color:var(--accent)}
.s-ok{background:var(--ok-soft);color:var(--ok)}
.s-warn{background:var(--warn-soft);color:var(--warn)}
.s-bad{background:var(--bad-soft);color:var(--bad)}
.mini{display:inline-block;font-size:.76rem;border:1px solid var(--line);border-radius:6px;padding:1px 7px;margin:0 4px 4px 0;background:var(--surface)}
.dgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.dgrid dt{font-size:.76rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.dgrid dd{margin-bottom:8px;overflow-wrap:anywhere}
.sample{font-size:.72rem;color:var(--warn);font-weight:700;margin-left:6px}
.acts{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px}
.empty{padding:28px;text-align:center;color:var(--muted)}

#toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:8px;max-width:calc(100% - 32px);font-size:.9rem;z-index:20}

@media (max-width:560px){
  .grid2{grid-template-columns:1fr}
  .sec{padding:16px}
  h1{font-size:1.3rem}
}
@media (prefers-reduced-motion:no-preference){.cat{transition:border-color .15s}}

/* bản triển khai */
.warnbar{background:var(--bad-soft);color:var(--bad);border:1px solid var(--bad);border-radius:6px;padding:10px 14px;margin-bottom:16px;font-weight:500}
.foot{margin-top:28px;text-align:center;font-size:.8rem}
.foot a{color:var(--muted)}
.login{max-width:420px}
.loginrow{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:space-between;margin-bottom:6px}
.toolbar{display:flex;flex-wrap:wrap;gap:8px}
#retrybox{margin-bottom:16px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
:root{color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark}}
[hidden]{display:none!important}
img{max-width:100%}
html{-webkit-text-size-adjust:100%}
.s-wait{background:var(--bg);color:var(--accent);box-shadow:inset 0 0 0 1.5px var(--accent)}