/* MK Merkezi Yönetim Sistemi — login */
*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#0a0d13; --bg-2:#0e131b; --surface:#121824; --surface-2:#172032;
  --line:#1f2a3d; --line-soft:#18212f;
  --text:#e8edf6; --muted:#8b98ad; --muted-2:#6f7d94;
  --brand:#2f7ff0; --brand-2:#1c63cc; --brand-soft:rgba(47,127,240,.13);
  --ok:#25b47e; --err:#e5484d; --warn:#e0a325;
  --radius:12px; --radius-lg:16px;
  --shadow:0 18px 48px rgba(0,0,0,.5);
  --font:'Segoe UI',system-ui,-apple-system,'Helvetica Neue',Arial,sans-serif;
}
html,body{height:100%}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--text);
  -webkit-font-smoothing:antialiased;font-size:15px;line-height:1.5;
}

/* ---------- layout ---------- */
.shell{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.panel{display:flex;align-items:center;justify-content:center;padding:40px 32px}

/* ---------- brand side ---------- */
.panel-brand{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 520px at 12% 8%, rgba(47,127,240,.18), transparent 60%),
    radial-gradient(700px 500px at 88% 92%, rgba(37,180,126,.10), transparent 62%),
    linear-gradient(160deg,#0b1018 0%,#0d1420 55%,#0a0f18 100%);
  border-right:1px solid var(--line-soft);
}
.panel-brand::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
}
.brand-inner{position:relative;z-index:1;max-width:430px;width:100%}
.mark{
  width:60px;height:60px;border-radius:15px;display:grid;place-items:center;
  font-weight:800;font-size:21px;letter-spacing:.5px;color:#fff;
  background:linear-gradient(145deg,var(--brand),var(--brand-2));
  box-shadow:0 10px 26px rgba(47,127,240,.34);
}
.mark.small{width:48px;height:48px;border-radius:12px;font-size:17px}
.brand-title{margin:26px 0 12px;font-size:33px;line-height:1.22;font-weight:700;letter-spacing:-.4px}
.brand-sub{margin:0 0 30px;color:var(--muted);font-size:15px;max-width:37ch}
.brand-points{list-style:none;margin:0;padding:0;display:grid;gap:13px}
.brand-points li{display:flex;align-items:center;gap:11px;color:#b8c4d6;font-size:14.5px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);flex:none;box-shadow:0 0 0 4px var(--brand-soft)}
.brand-foot{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);
  color:var(--muted-2);font-size:12.5px;letter-spacing:.9px;text-transform:uppercase
}

/* ---------- form side ---------- */
.panel-form{background:var(--bg-2)}
.form-wrap{width:100%;max-width:392px}
.form-head{margin-bottom:28px}
.logo-slot{margin-bottom:20px}
.logo-slot img{max-height:52px;max-width:190px;object-fit:contain;display:block}
.form-head h2{margin:0 0 6px;font-size:22px;font-weight:650;letter-spacing:-.2px}
.muted{color:var(--muted);font-size:14px;margin:0}

.field{display:block;margin-bottom:16px}
.field>span{display:block;font-size:12.5px;font-weight:600;color:#a6b3c6;margin-bottom:7px;letter-spacing:.2px}
input[type=text],input[type=password]{
  width:100%;padding:11px 13px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--surface);color:var(--text);
  font-size:14.5px;font-family:inherit;outline:none;
  transition:border-color .14s,box-shadow .14s,background .14s;
}
input::placeholder{color:#4d5a70}
input:focus{border-color:var(--brand);background:var(--surface-2);box-shadow:0 0 0 3px var(--brand-soft)}
input:disabled{opacity:.55;cursor:not-allowed}
input[aria-invalid=true]{border-color:var(--err)}

.input-group{position:relative;display:flex;align-items:center}
.input-group input{padding-right:44px}
.icon-btn{
  position:absolute;right:5px;width:34px;height:34px;display:grid;place-items:center;
  background:none;border:0;border-radius:8px;color:var(--muted);cursor:pointer;
  transition:color .14s,background .14s;
}
.icon-btn:hover{color:var(--text);background:rgba(255,255,255,.05)}
.icon-btn.on{color:var(--brand)}

.code-input{
  letter-spacing:.42em;font-size:20px;text-align:center;font-weight:600;
  font-variant-numeric:tabular-nums;padding:13px 13px;
}
.code-input::placeholder{letter-spacing:.42em;color:#3a4658}

.btn-primary{
  width:100%;margin-top:6px;padding:12px 16px;border:0;border-radius:var(--radius);
  background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff;
  font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;
  display:flex;align-items:center;justify-content:center;gap:9px;
  box-shadow:0 6px 18px rgba(47,127,240,.26);
  transition:filter .14s,box-shadow .14s;
}
.btn-primary:hover:not(:disabled){filter:brightness(1.07)}
.btn-primary:disabled{opacity:.62;cursor:not-allowed;box-shadow:none}
.btn-ghost{
  width:100%;margin-top:10px;padding:10px 16px;border:1px solid var(--line);
  border-radius:var(--radius);background:transparent;color:var(--muted);
  font-size:14px;font-family:inherit;cursor:pointer;transition:color .14s,border-color .14s;
}
.btn-ghost:hover{color:var(--text);border-color:#2b3a52}

.spinner{
  width:15px;height:15px;border-radius:50%;flex:none;
  border:2px solid rgba(255,255,255,.35);border-top-color:#fff;
  animation:spin .6s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

.qr-box{display:grid;place-items:center;padding:14px;background:#fff;border-radius:var(--radius);margin:14px 0}
.qr-box img{width:180px;height:180px;display:block}
.secret-row{
  display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
  padding:10px 13px;background:var(--surface);border:1px solid var(--line);
  border-radius:10px;margin-bottom:16px;
}
.secret-row code{font-family:'Cascadia Mono','SF Mono',Consolas,monospace;font-size:12.5px;color:#7ab4ff;word-break:break-all}
.totp-note{color:var(--muted);font-size:14px;margin:0 0 18px}
.totp-note strong{color:var(--text);font-weight:600}
.hint{color:var(--muted-2);font-size:12.5px;margin:14px 0 0;text-align:center}

.form-foot{
  margin-top:26px;padding-top:18px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.secure-badge{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--muted-2)}
.secure-badge.ok{color:var(--ok)}
.secure-badge.bad{color:var(--warn)}
.foot-meta{font-size:12.5px;color:var(--muted-2);font-variant-numeric:tabular-nums}

/* ---------- toast ---------- */
#toast{position:fixed;top:18px;right:18px;z-index:100;display:flex;flex-direction:column;gap:9px;max-width:min(370px,calc(100vw - 36px))}
.t{
  padding:11px 15px;border-radius:10px;font-size:14px;color:var(--text);
  background:var(--surface-2);border:1px solid var(--line);box-shadow:var(--shadow);
  border-left:3px solid var(--muted);
}
.t.success{border-left-color:var(--ok)}
.t.error{border-left-color:var(--err)}
.t.info{border-left-color:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .panel-brand{display:none}
  .panel-form{padding:30px 22px;min-height:100vh}
  .form-wrap{max-width:420px}
  .form-head h2{font-size:20px}
}
@media (max-width:420px){
  .panel-form{padding:24px 16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}