:root {
      --background: hsl(210 40% 98%);
      --foreground: hsl(222 47% 11%);
      --muted: hsl(215 20% 65%);
      --primary: hsl(217 93% 57%);
      --primary-dark: hsl(217 90% 48%);
      --card-bg: hsla(0, 0%, 100%, 0.7);
      --border: hsl(214 32% 91%);
    }

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

    body {
      font-family: "Inter", sans-serif;
      color: var(--foreground);
      background: var(--background);
      display: flex;
      height: 100vh;
      overflow: hidden;
    }

    /* --- Left side hero panel --- */
    .hero {
      width: 53%;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white;
      padding: 60px 70px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .hero h1 {
      font-size: 46px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
    }

    .hero p {
      font-size: 18px;
      opacity: 0.92;
      max-width: 560px;
    }

    /* --- Login section --- */
    .page-wrapper {
      width: 47%;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 40px;
    }

    .card {
      width: 100%;
      max-width: 420px;
      background: var(--card-bg);
      backdrop-filter: blur(18px);
      border: 1px solid var(--border);
      padding: 36px;
      border-radius: 16px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.06);
      animation: fadeIn 0.5s ease-out;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .logo {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      border-radius: 10px;
      margin-bottom: 14px;
    }

    .card h2 {
      margin: 0 0 6px;
      font-size: 26px;
      font-weight: 700;
    }

    .subtitle {
      color: var(--muted);
      margin-bottom: 24px;
      font-size: 15px;
    }

    label {
      display: block;
      margin-bottom: 6px;
      font-weight: 500;
      font-size: 14px;
    }

    input {
      width: 100%;
      height: 46px;
      padding: 0 12px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: white;
      margin-bottom: 18px;
      font-size: 15px;
      transition: 0.2s;
    }

    input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(86,158,255,0.35);
    }

    .btn {
      width: 100%;
      height: 46px;
      border: none;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: 0.2s;
      margin-top: 8px;
    }

    .btn:hover {
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      transform: translateY(-2px);
    }

    .alt-link {
      text-align: center;
      margin-top: 18px;
      font-size: 14px;
      color: var(--muted);
    }

    .alt-link a {
      color: var(--primary-dark);
      text-decoration: none;
      font-weight: 500;
    }

    .alt-link a:hover {
      text-decoration: underline;
    }

    @media (max-width: 900px) {
      body { flex-direction: column; overflow: auto; }
      .hero { width: 100%; height: 220px; padding: 40px; text-align: center; }
      .page-wrapper { width: 100%; padding: 30px; }
    }