:root {
  --gy-ink: #0b1220;
  --gy-muted: #5b677a;
  --gy-line: #d7dee8;
  --gy-paper: #f3f6f9;
  --gy-card: #ffffff;
  --gy-accent: #0f766e;
  --gy-accent-2: #115e59;
  --gy-warn: #b42318;
  --gy-radius: 14px;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

.giris-body {
  margin: 0;
  font-family: var(--font);
  color: var(--gy-ink);
  background: var(--gy-paper);
}

.giris-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
}

.giris-brand {
  position: relative;
  overflow: hidden;
  color: #e8f5f3;
  background:
    radial-gradient(1000px 500px at 10% 10%, rgba(45, 212, 191, 0.22), transparent 55%),
    radial-gradient(800px 400px at 90% 80%, rgba(14, 116, 144, 0.35), transparent 50%),
    linear-gradient(155deg, #082f2b 0%, #0b1220 48%, #102a43 100%);
  padding: 48px clamp(28px, 5vw, 64px);
  display: flex;
  align-items: flex-end;
}

.giris-brand__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 20%, transparent 70%);
  pointer-events: none;
}

.giris-brand__content {
  position: relative;
  max-width: 460px;
}

.giris-mark {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.giris-mark__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
}

.giris-mark__name {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.giris-brand h1 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 3vw, 2.55rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.giris-brand p {
  margin: 0 0 28px;
  color: rgba(232, 245, 243, 0.78);
  font-size: 1.05rem;
  line-height: 1.55;
  max-width: 36ch;
}

.giris-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.giris-points li {
  font-size: 0.86rem;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
}

.giris-main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px clamp(24px, 5vw, 72px);
  background:
    linear-gradient(180deg, #f8fafc 0%, #eef3f7 100%);
}

.giris-form {
  width: min(420px, 100%);
  margin: 0 auto;
  background: var(--gy-card);
  border: 1px solid var(--gy-line);
  border-radius: calc(var(--gy-radius) + 4px);
  padding: 32px 28px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.06);
}

.giris-form__head { margin-bottom: 26px; }

.giris-eyebrow {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gy-accent);
  font-weight: 500;
}

.giris-form h2 {
  margin: 0 0 8px;
  font-size: 1.65rem;
  letter-spacing: -0.03em;
}

.giris-form__head p:last-child {
  margin: 0;
  color: var(--gy-muted);
  font-size: 0.95rem;
}

.alan {
  display: grid;
  gap: 7px;
  margin-bottom: 16px;
}

.alan span {
  font-size: 0.86rem;
  font-weight: 600;
  color: #334155;
}

.alan input {
  width: 100%;
  height: 46px;
  border: 1px solid #c9d4e1;
  border-radius: 10px;
  padding: 0 14px;
  font: inherit;
  color: var(--gy-ink);
  background: #fbfdff;
  transition: border-color .15s, box-shadow .15s;
}

.alan input:focus {
  outline: none;
  border-color: var(--gy-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.beni-hatirla {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 18px;
  font-size: 0.9rem;
  color: #475569;
  cursor: pointer;
}

.giris-hata {
  margin-bottom: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #fef3f2;
  border: 1px solid #fecdca;
  color: var(--gy-warn);
  font-size: 0.9rem;
}

.giris-btn {
  width: 100%;
  height: 48px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(180deg, #0f766e 0%, #0d5f59 100%);
  color: #fff;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform .12s, filter .12s;
}

.giris-btn:hover { filter: brightness(1.05); }
.giris-btn:active { transform: translateY(1px); }
.giris-btn[disabled] { opacity: 0.7; cursor: wait; }

.giris-footer {
  margin: 22px auto 0;
  text-align: center;
  color: #94a3b8;
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .giris-shell { grid-template-columns: 1fr; }
  .giris-brand {
    min-height: 220px;
    align-items: center;
    padding: 32px 24px;
  }
  .giris-brand h1 { font-size: 1.7rem; }
  .giris-brand p { margin-bottom: 0; }
  .giris-points { display: none; }
}