:root {
  --bg-0: #070a0f; --panel: #0e1520; --panel-2: #0b111a; --line: #1b2735; --line-2: #24344a;
  --ink: #e8eff7; --ink-dim: #7d90a6; --cam: #22d3ee; --error: #ff5468;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Inter", system-ui, sans-serif;
  min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background:
    radial-gradient(1000px 600px at 80% -10%, rgba(34,211,238,0.07), transparent 60%),
    radial-gradient(800px 500px at 10% 110%, rgba(79,140,255,0.06), transparent 60%),
    var(--bg-0);
  color: var(--ink); -webkit-font-smoothing: antialiased;
}
.login {
  width: min(380px, 94vw);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line); border-radius: 18px; padding: 26px 26px 24px;
  box-shadow: 0 30px 80px -30px #000;
}
.brand { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.brand .mark { font-size: 26px; color: var(--cam); filter: drop-shadow(0 0 12px rgba(34,211,238,0.6)); }
.brand h1 { font-family: "Space Grotesk", sans-serif; font-size: 21px; font-weight: 700; letter-spacing: -0.02em; }
.brand h1 span { color: var(--ink-dim); font-weight: 600; }
.brand p { font-size: 12.5px; color: var(--ink-dim); margin-top: 3px; }
label { display: block; font-size: 12px; color: var(--ink-dim); margin-bottom: 14px; letter-spacing: 0.02em; }
input {
  display: block; width: 100%; margin-top: 6px; padding: 11px 13px;
  background: #0a121b; border: 1px solid var(--line-2); border-radius: 10px;
  color: var(--ink); font: inherit; font-size: 14px; outline: none; transition: border-color 0.15s;
}
input:focus { border-color: var(--cam); }
button {
  width: 100%; margin-top: 6px; padding: 12px; font: inherit; font-size: 14px; font-weight: 600;
  color: #04120c; background: linear-gradient(180deg, #37e0a0, #22c58a);
  border: 0; border-radius: 10px; cursor: pointer; transition: filter 0.15s;
}
button:hover { filter: brightness(1.06); }
button:disabled { opacity: 0.6; cursor: default; }
.err { margin-top: 14px; font-size: 13px; color: var(--error); text-align: center; }