/* ===========================================
   National A.I Company – Login (Dark Blue Theme)
   Ana renkler: Koyu Mavi & Beyaz
   =========================================== */

*, *::before, *::after { box-sizing: border-box; }

:root{
  /* Açık tema */
  --bg: #f5f8ff;
  --bg-2: #e6edffcc;
  --panel: #ffffff;
  --text: #0b1a3a;
  --muted: #4b5e8a;
  --border: #dbe4ff;

  /* Ana renkler (koyu mavi tonları) */
  --brand-a: #1e3a8a;  /* koyu mavi */
  --brand-b: #2563eb;  /* ana mavi */
  --brand-c: #0f172a;  /* çok koyu lacivert */

  --brand:   var(--brand-a);
  --brand-2: var(--brand-b);
  --brand-3: var(--brand-c);

  --ok: #16a34a;
  --error: #ef4444;

  --radius: 18px;
  --shadow: 0 18px 48px rgba(30, 58, 138, .15);
  --ring: 0 0 0 4px rgba(37,99,235,.25);
  --transition: 180ms ease;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial;
}

/* Koyu mod */
@media (prefers-color-scheme: dark){
  :root{
    --bg: #0a0f1f;
    --bg-2: #0f172acc;
    --panel: #0f172a;
    --text: #e5e7eb;
    --muted: #93c5fd;
    --border: #1e293b;
    --shadow: 0 16px 48px rgba(0,0,0,.6);
    --ring: 0 0 0 3px rgba(37,99,235,.4);
  }
}

html, body { height: 100%; }
body { margin: 0; font-family: var(--font); color: var(--text); }

/* === Arka Plan === */
.login-body{
  min-height: 100%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(1100px 560px at 88% -8%, rgba(37,99,235,.25), transparent 60%),
    radial-gradient(1000px 620px at -10% 100%, rgba(30,58,138,.25), transparent 60%),
    linear-gradient(180deg, var(--bg), #ffffff);
  padding: 28px;
  position: relative;
  isolation: isolate;
}
.login-body::after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(0deg, rgba(37,99,235,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events:none;
  z-index:-1;
}

/* === Container === */
.login-container{
  width: 100%;
  max-width: 480px;
  background: linear-gradient(180deg, var(--panel), #eef2ff);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px 30px 26px;
  backdrop-filter: blur(8px);
  animation: pop var(--transition);
}

@keyframes pop{
  from{ opacity: 0; transform: translateY(8px) scale(.985); }
  to{ opacity: 1; transform: translateY(0) scale(1); }
}

/* === Logo === */
.logo-box{
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}
.logo-img{
  height: 80px;
  filter: drop-shadow(0 8px 16px rgba(37,99,235,.3));
}

/* === Başlık === */
.login-container h2{
  text-align: center;
  margin: 12px 0 18px;
  font-size: 24px;
  font-weight: 800;
  /* background: linear-gradient(90deg, var(--brand-a), var(--brand-b), var(--brand-c)); */
  -webkit-background-clip: text;
  color: #ffff;
}

/* === Hata === */
.error{
  margin: 0 0 14px;
  padding: 10px 12px;
  background: rgba(239, 68, 68, .1);
  color: #b91c1c;
  border: 1px solid rgba(239, 68, 68, .3);
  border-radius: 12px;
  font-size: 14px;
}

/* === Form === */
form{
  display: grid;
  gap: 12px;
}

input{
  width: 100%;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: #000;
  font-size: 15px;
  transition: 180ms;
}
input::placeholder{ color: var(--muted); }

input:focus{
  border-color: var(--brand-b);
  box-shadow: var(--ring);
}

/* === Button === */
button[type="submit"]{
  border: 0;
  border-radius: 12px;
  padding: 12px;
  font-weight: 800;
  color: #fff;
  cursor: pointer;
  background: linear-gradient(90deg, var(--brand-a), var(--brand-b), var(--brand-c));
  box-shadow: 0 14px 28px rgba(30,58,138,.35);
}

button:hover{ filter: brightness(1.05); }
button:active{ transform: translateY(1px); }

/* === Helper === */
.helper{
  margin-top: 10px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.helper a{
  background: linear-gradient(90deg, var(--brand-b), var(--brand-a));
  -webkit-background-clip: text;
  color: transparent;
}

/* === Responsive === */
@media (max-width: 520px){
  .login-container{ padding: 24px 18px; }
  .logo-img{ height: 70px; }
}