:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #111827;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  min-height: 100%;
}

body {
  font-family: Inter, system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #e8ebee 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #eceff3 0%, transparent 50%),
    var(--bg);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 420px);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(17, 24, 39, 0.08);
  padding: 28px 28px 24px;
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.login-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #111827;
  color: #fff;
  flex-shrink: 0;
}

.login-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}

.login-card h1 {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.2;
}

.login-copy {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
  margin-bottom: 20px;
}

.login-card label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.login-card input {
  width: 100%;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0 14px;
  font: inherit;
  font-size: 0.95rem;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.login-card input:focus {
  border-color: #111827;
  box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
}

.login-error {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 0.88rem;
}

.login-card button {
  width: 100%;
  margin-top: 16px;
  height: 46px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.login-card button:hover:not(:disabled) {
  opacity: 0.9;
}

.login-card button:disabled {
  opacity: 0.65;
  cursor: wait;
}