/* ═══ app.css — หน้า Login (Premium Split Stage) ═══ */
.login-stage{min-height:100dvh;display:grid;place-items:center;padding:24px;
  background:
    radial-gradient(1200px 600px at 10% 0%,rgba(99,102,241,.25),transparent 60%),
    radial-gradient(1000px 500px at 100% 100%,rgba(251,191,36,.14),transparent 55%),
    linear-gradient(135deg,#0f172a,#1e1b4b 55%,#312e81)}
.login-card{width:100%;max-width:1080px;display:grid;grid-template-columns:1.1fr 1fr;
  background:rgba(255,255,255,.06);backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.12);border-radius:26px;overflow:hidden;
  box-shadow:0 40px 100px rgba(0,0,0,.5)}

/* Brand panel */
.lf-brand{padding:52px 46px;color:#e2e8f0;position:relative;
  background:linear-gradient(160deg,rgba(49,46,129,.6),rgba(15,23,42,.2))}
.lf-brand::before{content:"";position:absolute;inset:0;
  background:radial-gradient(400px 260px at 30% 20%,rgba(129,140,248,.28),transparent 60%);pointer-events:none}
.lf-logo{width:60px;height:60px;border-radius:18px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-400),var(--brand-700));color:#fff;font-size:30px;
  box-shadow:0 12px 30px rgba(79,70,229,.5);position:relative}
.lf-logo::after{content:"";position:absolute;inset:-8px;border-radius:24px;
  border:2px solid rgba(129,140,248,.35);animation:pulseRing 3s var(--ease) infinite}
@keyframes pulseRing{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.35);opacity:0}}
.lf-tagline{font-family:"Kanit",sans-serif;font-size:29px;font-weight:700;margin:22px 0 8px;
  line-height:1.25;background:linear-gradient(90deg,#fff,#c7d2fe,#fff);-webkit-background-clip:text;
  background-clip:text;color:transparent;background-size:200% auto;animation:shine 5s linear infinite}
@keyframes shine{to{background-position:200% center}}
.lf-sub{color:#a5b4fc;font-size:14.5px;margin-bottom:26px;position:relative}
.lf-feat{display:grid;gap:12px;position:relative}
.lf-feat-item{display:flex;gap:13px;align-items:flex-start;padding:13px 15px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.09);border-radius:14px}
.lf-feat-ico{width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(129,140,248,.3),rgba(79,70,229,.2));color:#c7d2fe;font-size:18px}
.lf-feat-item strong{display:block;font-family:"Kanit",sans-serif;font-size:14.5px;color:#f1f5f9;font-weight:600}
.lf-feat-item span{font-size:12.5px;color:#94a3b8}
.lf-stats{display:flex;gap:22px;margin-top:26px;position:relative}
.lf-stat b{font-family:"Kanit",sans-serif;font-size:22px;color:#fff;display:block}
.lf-stat span{font-size:12px;color:#a5b4fc}

/* Form card */
.lf-form-wrap{background:#fff;padding:48px 44px;display:flex;flex-direction:column;justify-content:center}
.lf-mini-brand{display:none;align-items:center;gap:12px;margin-bottom:24px}
.lf-mini-brand .lf-logo{width:44px;height:44px;font-size:22px}
.lf-mini-brand::after{display:none}
.lf-title{font-family:"Kanit",sans-serif;font-size:26px;font-weight:700;color:var(--ink)}
.lf-title-sub{font-size:13.5px;color:var(--ink-muted);margin:4px 0 26px}
.lf{display:flex;flex-direction:column;gap:15px}
.lf.shake{animation:shakeX .5s}
@keyframes shakeX{0%,100%{transform:translateX(0)}20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
.lf-input-wrap{position:relative}
.lf-input-wrap>i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--ink-faint);font-size:17px}
.lf-input-wrap .field{padding-left:42px}
.lf-eye{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:none;
  color:var(--ink-faint);cursor:pointer;font-size:17px;padding:6px}
.lf-eye:hover{color:var(--brand-600)}
.lf-caps{font-size:12px;color:var(--warn);display:none;gap:5px;align-items:center;margin-top:-6px}
.lf-caps.show{display:flex}
.lf-row{display:flex;align-items:center;justify-content:space-between;font-size:13px}
.lf-remember{display:flex;align-items:center;gap:7px;color:var(--ink-soft);cursor:pointer}
.lf-remember input{width:16px;height:16px;accent-color:var(--brand-600)}
.lf-msg{font-size:13px;color:var(--danger);min-height:18px;display:flex;gap:6px;align-items:center}

/* Multi-state submit */
.lf-submit{position:relative;height:52px;border:none;border-radius:13px;cursor:pointer;overflow:hidden;
  font-family:"Kanit",sans-serif;font-size:16px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));box-shadow:0 10px 26px rgba(79,70,229,.4)}
.lf-submit[data-state]{pointer-events:none}
.lf-submit-state{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:9px;
  opacity:0;transform:translateY(8px);transition:opacity .25s,transform .25s}
.lf-submit-state-default{opacity:1;transform:none}
.lf-submit[data-state="loading"]{background:linear-gradient(135deg,#1e293b,#312e81)}
.lf-submit[data-state="success"]{background:linear-gradient(135deg,#059669,#047857)}
.lf-submit[data-state="error"]{background:linear-gradient(135deg,#e11d48,#be123c);animation:shakeX .5s}
.lf-submit:not([data-state]) .lf-submit-state-default,
.lf-submit[data-state="loading"] .lf-submit-state-loading,
.lf-submit[data-state="success"] .lf-submit-state-success,
.lf-submit[data-state="error"] .lf-submit-state-error{opacity:1;transform:none}
.lf-droplets{display:inline-flex;gap:5px}
.lf-droplets span{width:8px;height:8px;border-radius:50%;background:#c7d2fe;animation:bounce .9s infinite}
.lf-droplets span:nth-child(2){animation-delay:.15s}
.lf-droplets span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,100%{transform:translateY(0);opacity:.5}50%{transform:translateY(-7px);opacity:1}}

/* Demo cards */
.lf-demo{margin-top:24px;padding-top:22px;border-top:1px dashed var(--line-strong)}
.lf-demo-head{font-size:12.5px;color:var(--ink-muted);display:flex;align-items:center;gap:8px;margin-bottom:12px}
.lf-demo-head .pill{margin-left:auto;background:var(--brand-100);color:var(--brand-700);font-weight:700;
  font-size:10.5px;padding:2px 8px;border-radius:999px;letter-spacing:.06em}
.lf-demo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.lf-demo-card{border:1.5px solid var(--line);border-radius:12px;padding:11px 6px;text-align:center;cursor:pointer;
  background:#fff;transition:transform .16s var(--ease),border-color .16s,box-shadow .16s}
.lf-demo-card:hover{transform:translateY(-2px);border-color:var(--brand-300);box-shadow:var(--shadow)}
.lf-demo-card i{font-size:22px;display:block;margin-bottom:5px}
.lf-demo-card b{display:block;font-family:"Kanit",sans-serif;font-size:12px;color:var(--ink)}
.lf-demo-hint{font-size:11.5px;color:var(--ink-faint);text-align:center;margin-top:10px}

.lf-footer{margin-top:26px;text-align:center;font-size:12px;color:var(--ink-faint)}

@media (max-width:900px){
  .login-card{grid-template-columns:1fr;max-width:460px}
  .lf-brand{display:none}
  .lf-mini-brand{display:flex}
  .lf-form-wrap{padding:36px 26px}
  .lf-demo-grid{grid-template-columns:repeat(2,1fr)}
}