:root {
  --bg: #050705;
  --card: #121816;
  --border: #243028;
  --text: #f3f6f4;
  --muted: #8b968f;
  --green: #39e26a;
  --danger: #ff5c5c;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(57, 226, 106, 0.12), transparent 55%),
    var(--bg);
}
a { color: var(--green); text-decoration: none; }
.wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  width: min(420px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: #fff;
  font-weight: 800;
}
.brand img {
  height: 28px;
  filter: brightness(0) invert(1);
}
h1 { margin: 0 0 8px; font-size: 1.45rem; }
.sub { margin: 0 0 22px; color: var(--muted); font-size: 14px; }
label { display: grid; gap: 6px; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
input {
  width: 100%;
  border: 1px solid var(--border);
  background: #0c100e;
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
}
button {
  width: 100%;
  margin-top: 8px;
  border: 0;
  border-radius: 12px;
  padding: 13px 16px;
  background: var(--green);
  color: #04110a;
  font-weight: 800;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: wait; }
.error {
  margin: 0 0 12px;
  color: var(--danger);
  font-size: 14px;
}
.hidden { display: none !important; }
.switch { margin-top: 16px; text-align: center; color: var(--muted); font-size: 14px; }