:root {
  --bg: #f2f3f5;

  --panel: #12151c;
  --accent: #6cf2c2;
  --text: #e7e9ee;
  --muted: #8a8f9c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  background-color: var(--bg);
  background:
    radial-gradient(800px 400px at 50% -100px, #202431, transparent),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  padding: 32px 20px 48px;
  text-align: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.logo-mark {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--bg);
  background:
    radial-gradient(circle at center, transparent 32%, #000 33%, #000 38%, transparent 39%),
    linear-gradient(135deg, #1b1f2a, #000);
  border: 1px solid #2a2f3a;
}

.logo h1 {
  margin: 0;
  font-size: 2.1rem;
  letter-spacing: 0.25em;
}

.tagline {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

main {
  max-width: 960px;
  margin: 0 auto 60px;
  padding: 0 20px;
}

.card {
  background-color: var(--bg);
  background: linear-gradient(180deg, #141826, var(--panel));
  border: 1px solid #222838;
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 30px 80px rgba(0,0,0,.55);
}

textarea, input, select, button {
  width: 100%;
  background-color: var(--bg);
  background: #0c0f16;
  color: var(--text);
  border: 1px solid #2a3040;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
}

button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  background: linear-gradient(135deg, #6cf2c2, #4ddfa8);
  color: #0b0d10;
  border: none;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 10px 24px rgba(108, 242, 194, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}


button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(108, 242, 194, 0.5);
}



footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 0.75rem;
}

/* responsive tweaks */
@media (max-width: 640px) {
  .logo h1 { font-size: 1.6rem; letter-spacing: 0.18em; }
  .card { padding: 20px; }
}

.logo img{
  width:56px;
  height:56px;
  display:block;
  filter: drop-shadow(0 10px 24px rgba(0,0,0,.65));
}