:root{
  --bg:#f3f4f6; --ink:#0b1726; --card:#ffffff;
  --brand:#147fb1; --accent:#22c55e;
  --tap:56px; --radius:16px;
  --shadow:0 6px 24px rgba(0,0,0,.08);
  --field:#cfd6df;
  --font-lg:18px;
  --font-md:17px;
  --font-sm:15px;
}
*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; color:var(--ink);
  font-family:"Inter","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  -webkit-text-size-adjust:100%;
  display:grid; place-items:center;
  padding:20px 16px calc(20px + env(safe-area-inset-bottom));
  font-size:var(--font-md);
  line-height:1.55;
  background:
    radial-gradient(920px 520px at 12% -12%, rgba(56,189,248,.20), transparent 55%),
    radial-gradient(760px 420px at 90% 8%, rgba(59,130,246,.16), transparent 55%),
    linear-gradient(180deg, #f3f9ff 0%, #e6f1ff 100%);
}

.login-box{
  width:100%; max-width:420px;
  background:var(--card); border:1px solid #e5e7eb;
  border-radius:var(--radius); padding:32px 22px;
  box-shadow:var(--shadow); text-align:center;
}

.login-box img{
  width:70vw;
  max-width:280px;
  min-width:160px;
  height:auto;
  margin-bottom:0;
}

h2{
  margin:0 0 8px;
  font-size:2.3rem;
  font-weight:550;
  line-height:1.4;
}
p#error{
  min-height:1.4em; margin:10px 0 0;
  color:#ef4444; font-weight:700; font-size:var(--font-sm);
}

label{
  display:block; text-align:left;
  font-weight:700;
  margin:16px 2px 6px;
  font-size:var(--font-md);
}

input{
  width:100%; height:var(--tap);
  padding:14px 16px; font-size:var(--font-md);
  background:#fff; border:1px solid var(--field);
  border-radius:12px; outline:none;
}
input:focus{border-color:var(--brand); box-shadow:0 0 0 3px rgba(20,127,177,.15)}

.field-wrap{position:relative}
.field-wrap input{padding-right:56px;}
.pw-toggle{
  position:absolute; right:10px; top:50%; transform:translateY(-50%);
  width:40px; height:40px;
  border:1px solid #e5e7eb;
  background:#fff;
  border-radius:10px;
  display:grid; place-items:center;
  cursor:pointer;
  user-select:none;
}
.pw-toggle:active{transform:translateY(-50%) translateY(1px)}
.pw-toggle svg{width:20px; height:20px}
.is-hidden{display:none}

.hint-row{
  display:flex; justify-content:space-between; gap:8px;
  margin-top:8px; min-height:20px;
  font-size:var(--font-sm);
}
.caps-indicator{
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 10px;
  border-radius:999px;
  background:#fff7ed;
  border:1px solid #fed7aa;
  color:#9a3412;
  font-weight:700;
  visibility:hidden;
}
.caps-indicator.show{visibility:visible;}

button{
  width:100%; height:var(--tap);
  border:0; border-radius:12px; font-weight:800;
  font-size:var(--font-lg); cursor:pointer;
  transition:transform .05s ease, filter .15s ease;
}
.btn-primary{background:var(--brand); color:#fff}
.btn-primary:active{transform:translateY(1px)}

.actions{display:grid; gap:12px; margin-top:18px}
.meta{
  display:flex; gap:8px; justify-content:center;
  margin-top:12px; font-size:var(--font-sm); color:#334155;
}

.lang-switch{
  display:flex;
  justify-content:flex-end;
  gap:8px;
  margin-bottom:10px;
}
.lang-button{
  padding:6px 10px;
  border-radius:10px;
  border:1px solid #e5e7eb;
  background:#fff;
  cursor:pointer;
}

@media (max-width:380px){
  .login-box{padding:20px 14px; border-radius:14px}
  h2{font-size:1.4rem}
  input,button{font-size:16px}
}
.role-accent{
   color:#0326c4;
   font-weight:700;
}
.owner-link{
  position:fixed;
  bottom:calc(16px + env(safe-area-inset-bottom));
  padding:8px 12px;
  border:1px solid #cbd5e1;
  border-radius:999px;
  background:rgba(255,255,255,.94);
  color:#0f172a;
  font-size:13px;
  font-weight:700;
  line-height:1;
  text-decoration:none;
  box-shadow:0 4px 12px rgba(15,23,42,.12);
  z-index:10;
}
.owner-link{ left:16px; }
.owner-link:active{transform:translateY(1px)}