:root {
  --color-primary: #e5393f;
  --color-secondary: #422080;
  --color-success: #00a843;
  --color-dark: #111827;
  --color-muted: #4b5563;
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --radius-sm: 4px;
  --radius-md: 6px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(135deg, #f5f6f8 0%, #eceff4 100%);
  color: var(--color-dark);
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.06);
}

.login-logo {
  display: block;
  max-width: 180px;
  margin: 0 auto 20px;
}

.login-card h1 {
  margin: 0 0 8px;
  font-size: 28px;
  text-align: center;
}

.login-card p {
  margin: 0 0 24px;
  text-align: center;
  color: var(--color-muted);
}

.login-card form {
  display: grid;
  gap: 16px;
}

.login-card label span {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
}

.login-card input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 15px;
}

.login-card button {
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 16px;
  cursor: pointer;
}

.login-alert {
  margin-bottom: 16px;
  padding: 12px 14px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  border-radius: var(--radius-sm);
}