* { box-sizing: border-box; }

:root {
  --bg: #0f172a;
  --card: #ffffff;
  --accent: #1e6df2;
  --accent-hover: #1a5cd0;
  --muted: #64748b;
  --line: #d1d5db;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: radial-gradient(1100px 600px at 25% -10%, #1e3a8a 0%, #0f172a 60%);
  color: #fff;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  color: #0f172a;
  border-radius: 16px;
  padding: 34px 30px 26px;
  box-shadow: 0 24px 60px rgba(2, 6, 23, 0.45);
}

.logo {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1e6df2, #38bdf8);
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 18px rgba(30, 109, 242, 0.35);
}

h1 { font-size: 21px; margin: 18px 0 6px; letter-spacing: -0.2px; }

.hint { color: var(--muted); font-size: 13px; line-height: 1.5; margin: 0 0 20px; }

label { display: block; font-size: 12px; color: #475569; margin: 12px 0 4px; font-weight: 600; }

input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(30, 109, 242, 0.18); }

button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  border: 0;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
button:hover { background: var(--accent-hover); }
button:active { transform: translateY(1px); }

.note { color: #94a3b8; font-size: 12px; text-align: center; margin: 18px 0 0; }