/* ============================================================
   QR & Shortlink — ระบบจัดการ (ธีม Tech University)
   ============================================================ */
:root{
  --primary:#2563EB;
  --primary-d:#1d4ed8;
  --primary-l:#dbe7ff;
  --accent:#06b6d4;
  --ink:#0b1736;
  --navy:#0b1736;
  --navy-2:#13265a;
  --bg:#f4f6fb;
  --card:#ffffff;
  --line:#e6e9f2;
  --muted:#6b7596;
  --text:#1b2440;
  --ok:#10b981;
  --warn:#f59e0b;
  --danger:#ef4444;
  --radius:14px;
  --shadow:0 1px 2px rgba(16,28,64,.06), 0 10px 30px -12px rgba(16,28,64,.18);
  --sb:266px;
  --font:"IBM Plex Sans Thai","Sarabun",system-ui,sans-serif;
  --display:"Prompt",var(--font);
  --mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
h1,h2,h3,h4,h5{font-family:var(--display);font-weight:600;color:var(--ink);margin:0 0 .4em}
.mono{font-family:var(--mono)}

/* ---------- AUTH (login/register) ---------- */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.auth-hero{
  position:relative;overflow:hidden;color:#fff;padding:56px;
  background:radial-gradient(1200px 600px at 80% -10%, #1b3a8a 0%, transparent 60%),
             linear-gradient(160deg,#0b1736 0%,#13265a 100%);
  display:flex;flex-direction:column;justify-content:space-between;
}
.auth-hero::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:22px 22px;mask:linear-gradient(180deg,#000,transparent 80%);
}
.auth-hero>*{position:relative;z-index:1}
.auth-hero h1{color:#fff;font-size:34px;line-height:1.25;max-width:18ch}
.auth-hero .tag{display:inline-flex;gap:8px;align-items:center;font-family:var(--mono);
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#7fb0ff;
  background:rgba(127,176,255,.1);border:1px solid rgba(127,176,255,.25);padding:6px 12px;border-radius:999px}
.auth-hero .feat{display:flex;gap:14px;align-items:flex-start;margin:14px 0;color:#c7d3ee;max-width:42ch}
.auth-hero .feat svg{flex:0 0 22px;color:var(--accent)}
.auth-card{display:flex;align-items:center;justify-content:center;padding:40px;background:var(--bg)}
.auth-box{width:100%;max-width:400px}
.auth-box .brand{display:flex;align-items:center;gap:12px;margin-bottom:26px}
@media(max-width:880px){.auth-wrap{grid-template-columns:1fr}.auth-hero{display:none}}

/* ---------- FORM ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.input,select,textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  font-family:var(--font);font-size:14px;background:#fff;color:var(--text);transition:.15s;
}
.input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-l)}
textarea{resize:vertical;min-height:84px}
.hint{font-size:12px;color:var(--muted);margin-top:5px}
.input-group{display:flex;align-items:stretch}
.input-group .addon{display:flex;align-items:center;padding:0 12px;background:#eef1f8;border:1px solid var(--line);
  border-right:0;border-radius:10px 0 0 10px;font-family:var(--mono);font-size:13px;color:var(--muted);white-space:nowrap;max-width:55%;overflow:hidden;text-overflow:ellipsis}
.input-group .input{border-radius:0 10px 10px 0}

/* ---------- BUTTON ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:10px 18px;border-radius:10px;border:1px solid transparent;font-family:var(--font);
  font-weight:600;font-size:14px;cursor:pointer;transition:.15s;background:#eef1f8;color:var(--ink)}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px -6px var(--primary)}
.btn-primary:hover{background:var(--primary-d)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-danger{background:#fee2e2;color:#b91c1c}
.btn-block{width:100%}
.btn-sm{padding:7px 12px;font-size:13px}
.btn-icon{padding:8px;width:36px;height:36px}

/* ---------- LAYOUT ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:var(--sb);flex:0 0 var(--sb);position:fixed;inset:0 auto 0 0;z-index:40;
  background:linear-gradient(180deg,#0b1736,#0c1d44);color:#c7d3ee;display:flex;flex-direction:column;
  border-right:1px solid rgba(255,255,255,.05)
}
.sidebar .logo{padding:22px 22px 14px;display:flex;align-items:center;gap:12px}
.sidebar .logo .mark{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:700;font-family:var(--display);flex:0 0 40px}
.sidebar .logo b{color:#fff;font-family:var(--display);font-size:15px;line-height:1.2;display:block}
.sidebar .logo span{font-size:11px;color:#7d8db5}
.nav{padding:10px 12px;overflow-y:auto;flex:1}
.nav .grp{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#5e6e98;padding:16px 12px 6px}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;color:#aebbdc;font-size:14px;margin:2px 0}
.nav a svg{width:19px;height:19px;flex:0 0 19px;opacity:.85}
.nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.nav a.active{background:linear-gradient(90deg,rgba(37,99,235,.25),rgba(6,182,212,.06));color:#fff;
  box-shadow:inset 3px 0 0 var(--accent)}
.nav a .badge{margin-left:auto;background:var(--danger);color:#fff;font-size:11px;border-radius:999px;padding:1px 7px}
.sidebar .me{padding:14px;border-top:1px solid rgba(255,255,255,.06);display:flex;gap:10px;align-items:center}
.sidebar .me img,.sidebar .me .ph{width:38px;height:38px;border-radius:10px;object-fit:cover;background:var(--navy-2);
  display:grid;place-items:center;color:#fff;font-weight:600}
.sidebar .me small{display:block;color:#7d8db5;font-size:11px}
.sidebar .me b{color:#fff;font-size:13px;font-weight:600;display:block;max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.main{flex:1;margin-left:var(--sb);min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);padding:13px 26px;display:flex;align-items:center;gap:16px}
.topbar .crumb{font-size:13px;color:var(--muted)}
.topbar .crumb b{color:var(--ink);font-family:var(--display)}
.topbar .spacer{flex:1}
.topbar .ico-btn{position:relative;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;display:grid;place-items:center;cursor:pointer;color:var(--ink)}
.topbar .ico-btn .dot{position:absolute;top:7px;right:7px;width:9px;height:9px;border-radius:50%;background:var(--danger);border:2px solid #fff}
.menu-toggle{display:none}
.content{padding:26px;max-width:1280px;width:100%;margin:0 auto}

@media(max-width:980px){
  .sidebar{transform:translateX(-100%);transition:.25s}
  body.nav-open .sidebar{transform:none}
  .main{margin-left:0}
  .menu-toggle{display:grid}
  body.nav-open::after{content:"";position:fixed;inset:0;background:rgba(7,15,40,.5);z-index:39}
}

/* ---------- PAGE HEAD ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-head h1{font-size:24px;margin:0}
.page-head p{color:var(--muted);margin:4px 0 0;font-size:14px}

/* ---------- CARD / TABLE ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-h{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}
.card-h h3{margin:0;font-size:16px}
.card-b{padding:20px}
.grid{display:grid;gap:18px}
.g-4{grid-template-columns:repeat(4,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:1080px){.g-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.g-4,.g-3,.g-2{grid-template-columns:1fr}}

/* stat cards */
.stat{padding:18px 20px;border-radius:var(--radius);background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;color:#fff;margin-bottom:14px}
.stat .num{font-family:var(--display);font-size:30px;font-weight:600;color:var(--ink);line-height:1}
.stat .lbl{color:var(--muted);font-size:13px;margin-top:6px}
.stat::after{content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;background:currentColor;opacity:.04}

table{width:100%;border-collapse:collapse}
thead th{text-align:left;font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);
  font-weight:600;padding:12px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
tbody td{padding:14px 16px;border-bottom:1px solid var(--line);font-size:14px;vertical-align:middle}
tbody tr:hover{background:#fafbff}
tbody tr:last-child td{border-bottom:0}
.code-pill{font-family:var(--mono);font-size:13px;background:var(--primary-l);color:var(--primary-d);
  padding:3px 9px;border-radius:7px;display:inline-block}

.tag{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px}
.tag-ok{background:#dcfce7;color:#15803d}
.tag-off{background:#f1f3f9;color:#6b7596}
.tag-warn{background:#fef3c7;color:#b45309}
.tag-danger{background:#fee2e2;color:#b91c1c}
.tag-info{background:#dbeafe;color:#1d4ed8}

.avatar{width:36px;height:36px;border-radius:9px;object-fit:cover;background:var(--primary-l);display:grid;place-items:center;color:var(--primary-d);font-weight:600;font-size:13px}

.empty{text-align:center;padding:48px 20px;color:var(--muted)}
.empty svg{width:48px;height:48px;opacity:.4;margin-bottom:10px}

/* toolbar */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.toolbar .search{flex:1;min-width:200px;position:relative}
.toolbar .search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);width:18px;height:18px}
.toolbar .search input{padding-left:38px}

/* modal-ish form rows */
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:600px){.row-2{grid-template-columns:1fr}}

/* QR studio */
.qr-studio{display:grid;grid-template-columns:340px 1fr;gap:22px}
@media(max-width:900px){.qr-studio{grid-template-columns:1fr}}
.qr-preview{position:sticky;top:84px;align-self:start;text-align:center}
.qr-canvas-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:grid;place-items:center;min-height:300px}
.swatches{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.swatch{width:30px;height:30px;border-radius:8px;border:2px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer}
.swatch.sel{box-shadow:0 0 0 2px var(--primary)}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{flex:1;border:0;background:#fff;padding:9px;cursor:pointer;font-family:var(--font);font-size:13px;color:var(--muted)}
.seg button.on{background:var(--primary);color:#fff}

/* notifications dropdown */
.notif-list{max-height:380px;overflow:auto}
.notif-item{display:flex;gap:12px;padding:13px 16px;border-bottom:1px solid var(--line)}
.notif-item.unread{background:#f3f7ff}
.notif-item .nic{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex:0 0 34px;color:#fff}

.divider{height:1px;background:var(--line);margin:18px 0}
.flex{display:flex;align-items:center;gap:10px}
.between{justify-content:space-between}
.muted{color:var(--muted)}
.text-sm{font-size:13px}
.mb0{margin-bottom:0}.mt0{margin-top:0}
.right{text-align:right}.center{text-align:center}
.nowrap{white-space:nowrap}