/* css/login.css */
:root{
  --bg:#0f172a;
  --card:#111827;
  --accent:#22c55e;
  --text:#e5e7eb;
  --muted:#94a3b8;
  --danger:#ef4444;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family: "Vazirmatn", "IRANSans", sans-serif;
  background: linear-gradient(120deg, #0f172a, #1e293b);
  color:var(--text);
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
}

.login-container{
  width:min(420px, 100%);
  background:var(--card);
  border:1px solid #1f2937;
  border-radius:14px;
  padding:24px;
  box-shadow:var(--shadow);
}

.login-container h2{
  margin:0 0 18px;
  text-align:center;
  font-size:20px;
}

.form-group{
  margin-bottom:14px;
}
label{
  display:block;
  margin-bottom:6px;
  color:var(--muted);
  font-size:14px;
}
input{
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid #334155;
  background:#0b1220;
  color:var(--text);
  outline:none;
}
input:focus{
  border-color:var(--accent);
}

.login-button{
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  border:none;
  background:var(--accent);
  color:#0f172a;
  font-weight:700;
  cursor:pointer;
  margin-top:6px;
}

.error-message{
  color:var(--danger);
  min-height:18px;
  font-size:13px;
  margin-bottom:6px;
}

.back-to-home{
  text-align:center;
  margin-top:12px;
  font-size:13px;
}
.back-to-home a{
  color:var(--muted);
}
@media (display-mode: standalone) {
  .back-to-index { display: none; }
}