:root{
  --bg0:#0B1321;        /* darkest */
  --bg1:#151B29;        /* mid */
  --bg2:#1A1F2E;        /* card */
  --line:rgba(255,255,255,.08);

  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.60);

  --teal:#3DCC9F;       /* from your UI highlights */
  --cyan:#1FA7BE;
  --blue:#197CBA;

  --shadow: 0 24px 70px rgba(0,0,0,.55);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);

  background:
    radial-gradient(900px 500px at 50% 10%, rgba(31,167,190,.18), transparent 60%),
    radial-gradient(700px 420px at 20% 70%, rgba(61,204,159,.14), transparent 60%),
    radial-gradient(800px 500px at 85% 80%, rgba(25,124,186,.14), transparent 60%),
    linear-gradient(180deg, var(--bg0), #0A1020 40%, #070B15);
}

.auth{
  min-height:100%;
  display:grid;
  place-items:center;
  padding:32px 16px;
}

.card{
  width:min(440px, 92vw);
  border-radius:18px;
  background: linear-gradient(180deg, rgba(26,31,46,.92), rgba(17,22,36,.92));
  border:1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  padding:28px;
}

.card__header h1{
  margin:0 0 6px;
  font-size:26px;
  letter-spacing:.2px;
}
.card__header p{
  margin:0 0 18px;
  color:var(--muted);
  font-size:14px;
}

.alert{
  border:1px solid rgba(255,107,107,.35);
  background: rgba(255,107,107,.10);
  color: rgba(255,255,255,.92);
  padding:10px 12px;
  border-radius:12px;
  font-size:13px;
  margin: 10px 0 14px;
}

.form{display:grid; gap:14px;}

.field{display:grid; gap:8px;}
.field__label{
  font-size:12px;
  color:var(--muted);
}

input[type="text"],
input[type="password"]{
  width:100%;
  border-radius:12px;
  border:1px solid var(--line);
  background: rgba(10,15,28,.65);
  color:var(--text);
  padding:12px 12px;
  outline:none;
  transition: border-color .15s ease, box-shadow .15s ease;
}

input::placeholder{color:rgba(255,255,255,.35)}
input:focus{
  border-color: rgba(61,204,159,.55);
  box-shadow: 0 0 0 4px rgba(61,204,159,.12);
}

.password{
  display:grid;
  grid-template-columns: 1fr auto;
  gap:10px;
  align-items:center;
}
.password__toggle{
  border:1px solid var(--line);
  background: rgba(10,15,28,.65);
  color: rgba(255,255,255,.72);
  border-radius:12px;
  padding:10px 12px;
  cursor:pointer;
}
.password__toggle:hover{
  border-color: rgba(255,255,255,.18);
}

.row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:2px;
}

.check{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--muted);
  font-size:13px;
}
.check input{accent-color: var(--teal);}

.link{
  color: rgba(31,167,190,.95);
  text-decoration:none;
  font-size:13px;
}
.link:hover{ text-decoration:underline; }

.btn{
  margin-top:6px;
  width:100%;
  border:none;
  border-radius:14px;
  padding:12px 14px;
  color:#081019;
  font-weight:700;
  cursor:pointer;
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--teal));
  box-shadow: 0 14px 30px rgba(31,167,190,.18);
}
.btn:hover{ filter: brightness(1.04); }
.btn:active{ transform: translateY(1px); }

.card__footer{
  margin-top:16px;
  text-align:center;
}
.muted{ color: var(--muted); }