*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

:root{
  --bg: #0f172a;        /* page background */
  --card: #111827;      /* card background */
  --border: #253046;    /* input border */
  --text: #e5e7eb;      /* main text */
  --muted: #94a3b8;     /* subtitle text */
  --accent: #22c55e;    /* highlight */
  --danger: #f87171;
}

body{
  background: var(--bg);
  min-height: 100vh;
  color: var(--text);
}

.page{
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px; /* good mobile margin */
}

.card{
  width: 520px;              /* PC size stays consistent */
  max-width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
}

.title{
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.subtitle{
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
}

.field{
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 12px;
}

.field:focus-within{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
}

.field input{
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 16px;
}

.field input::placeholder{
  color: #64748b;
}

.eye-btn{
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 6px;
  border-radius: 10px;
  display: grid;
  place-items: center;
}

.eye-btn:hover{
  background: rgba(148, 163, 184, 0.12);
}

.eye-btn:active{
  transform: scale(0.98);
}

.eye-btn img{
  
  height: 22px;
  display: block;
}

.hint{
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted);
}

/* Mobile tuning */
@media (max-width: 420px){
  .card{
    padding: 18px;
    width: 100%;
  }
  .title{
    font-size: 18px;
  }
  .field{
    padding: 10px;
  }
}