:root {
  color-scheme: dark;
  --bg: #0f0f0f;
  --card: #1e1e1e;
  --accent: #10a37f;
  --text: #ececec;
  --muted: #9a9a9a;
  --border: rgba(255, 255, 255, 0.07);
}

* {
  box-sizing: border-box;
  font-family: "Space Grotesk", "Sora", "Segoe UI", system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-shell {
  width: min(520px, 92vw);
}

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
  text-align: center;
}

h1 {
  margin: 0 0 8px;
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--muted);
}

form {
  display: grid;
  gap: 16px;
  margin: 0 0 18px;
}

label {
  display: grid;
  gap: 8px;
  text-align: left;
  font-size: 0.9rem;
  color: var(--muted);
}

input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 1rem;
}

button {
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

button:hover {
  opacity: 0.85;
}

.notice {
  margin: 10px 0 6px;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer {
  margin: 0;
  color: #6b7280;
  font-size: 0.75rem;
}

.error {
  margin-top: 12px;
  color: #ff8a8a;
  font-size: 0.85rem;
  min-height: 1.1em;
}