:root {
  --bg: #f5f6fa;
  --glass-bg: rgba(255,255,255,0.55);
  --blur: blur(14px);
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --primary: #e63946;
  --shadow: 0 8px 24px rgba(0,0,0,0.12);
  --radius-lg: 20px;
}

body {
  font-family: system-ui, sans-serif;
  background: linear-gradient(145deg, #e8ecf3 0%, #f8fafc 100%);
  margin: 0;
  padding: 0;
  display: flex;
  height: 100vh;
  align-items: center;
  justify-content: center;
}

.login-app {
  width: 100%;
  max-width: 420px;
  padding: 16px;
}

.glass-box {
  background: var(--glass-bg);
  backdrop-filter: var(--blur);
  padding: 28px 22px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: center;
}

.login-title {
  margin: 0;
  font-size: 24px;
  font-weight: 800;
}

.login-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
  margin-bottom: 20px;
}

.input-group {
  text-align: left;
  margin-bottom: 16px;
}

.input-group label {
  font-size: 14px;
  color: var(--text-main);
}

.input-group input {
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  border-radius: 12px;
  border: none;
  background: #fff;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.05);
  font-size: 15px;
}

.login-btn {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  border: none;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: 14px;
  cursor: pointer;
  margin-top: 10px;
  box-shadow: 0 6px 16px rgba(230,57,70,0.3);
}

.login-btn:active {
  transform: scale(0.97);
}

.login-error {
  margin-top: 12px;
  color: #e63946;
  font-size: 14px;
  display: none;
}