:root{
  --bg:#0b0f17;
  --card:#111827;
  --line:rgba(255,255,255,.08);
  --text:#e8edf6;
  --muted:#98a3b7;
  --primary:#7e1b1b;   /* aksen maroon */
  --accent:#b02a2a;
}

/* Base */
*{ box-sizing: border-box }
html,body{ height:100% }
body{
  background: radial-gradient(1200px 600px at 110% -10%, #152238 0%, var(--bg) 55%) fixed;
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  margin:0;
}

/* Topbar */
.auth-topbar{
  backdrop-filter: blur(6px);
  background: rgba(10,14,24,.6);
  border-bottom: 1px solid var(--line);
  position: sticky; top:0; z-index:10;
}
.brand-logo{ height:40px; width:auto; display:block }
.brand-name{ font-family: Rajdhani, sans-serif; font-weight:700; color:#fff }

/* Wrapper */
.auth-wrapper{ padding: 40px 0 24px }
.auth-card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}

/* Form side */
.title{
  font-family: Rajdhani, sans-serif;
  font-weight:700;
  letter-spacing:.3px;
}
.subtitle{ color: var(--muted) }

.form-label{ color:#c9d3e7 }
.form-control{
  background:#0f1624; color:#fff; border:1px solid var(--line);
  border-radius: 12px;
}
.form-control:focus{
  border-color:#3a63e0;
  box-shadow: 0 0 0 .2rem rgba(58,99,224,.15);
}
.input-group .btn{ border-color: var(--line) }
.btn-primary{
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none; border-radius: 12px;
}

/* ==== HERO SIDE (banner gambar) ==== */
.hero-side{
  /* Foto kursi (Unsplash) */
  background-image: url('https://images.unsplash.com/photo-1507878866276-a947ef722fee?q=80&w=1600&auto=format&fit=crop');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 240px;           /* mobile */
  position: relative;
}

/* overlay & teks di atas gambar */
.hero-overlay{
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.25), rgba(0,0,0,.78));
  display: flex;
  align-items: end;
}

.hero-title{
  font-family: Rajdhani, sans-serif;
  font-weight: 700;
  letter-spacing: .4px;
  color: #fff;
}
.hero-sub{ color: #d0d6e5 }

/* Divider halus antar kolom saat desktop */
@media (min-width: 992px){
  .hero-side{ min-height: 520px; }             /* lebih tinggi di desktop */
  .auth-card .row > div:first-child{
    border-right: 1px solid rgba(255,255,255,.08);
  }
}