:root {
  --bg: #0b0f14;
  --panel: #131b25;
  --panel-2: #182230;
  --line: #223042;
  --ink: #e8eef6;
  --ink-dim: #8ea1b7;
  --solar: #ffb020;
  --solar-glow: #ffcb47;
  --batt: #2fd18a;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: radial-gradient(1200px 700px at 78% -10%, #16283b 0%, transparent 55%),
    radial-gradient(900px 600px at 5% 110%, #1b1330 0%, transparent 50%), var(--bg);
  display: grid;
  place-items: center;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
.card {
  width: 340px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 26px 26px;
  box-shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.7);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(150deg, #ffb020, #ff6a3d);
  box-shadow: 0 10px 30px -8px rgba(255, 138, 32, 0.6);
  flex-shrink: 0;
}
.brand-mark .bolt { font-size: 22px; }
.brand h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 19px;
  margin: 0;
  letter-spacing: -0.02em;
}
.brand h1 span { color: var(--solar-glow); }
.brand p { margin: 3px 0 0; font-size: 12px; color: var(--ink-dim); }

form { display: flex; flex-direction: column; gap: 6px; }
label { font-size: 12px; color: var(--ink-dim); margin-top: 8px; }
input {
  background: #0c121a;
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 14px;
}
input:focus { outline: none; border-color: var(--batt); }
button {
  margin-top: 18px;
  background: linear-gradient(150deg, #2fd18a, #1fae72);
  color: #06231a;
  border: none;
  border-radius: 10px;
  padding: 11px;
  font-family: inherit;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.1s;
}
button:hover { transform: translateY(-1px); }
button:disabled { opacity: 0.6; cursor: default; }
.error {
  min-height: 18px;
  color: #ff6b6b;
  font-size: 12.5px;
  margin-top: 10px;
  text-align: center;
}