:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --text: #374151;
            --text-light: #9ca3af;
            --bg: #f9fafb;
            --white: #ffffff;
            --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 4px 10px -5px rgba(0, 0, 0, 0.04);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1rem;
        }

        .login-card {
            background: var(--white);
            width: 100%;
            max-width: 420px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            padding: 2.5rem 2rem;
            text-align: center;
        }

        .logo h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }

        .logo p {
            color: var(--text-light);
            font-size: 1rem;
            margin-bottom: 2rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
            position: relative;
        }

        input {
            width: 100%;
            padding: 1rem 1rem 1rem 1rem;
            border: 1.5px solid #e5e7eb;
            border-radius: 12px;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
        }

        .toggle-password {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #94a3b8;
            cursor: pointer;
            font-size: 1.2rem;
            padding: 4px;
        }

        .btn-login {
            width: 100%;
            padding: 1rem;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 1rem;
        }

        .btn-login:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(99, 102, 241, 0.25);
        }

        .contact {
            margin-top: 2rem;
            font-size: 0.95rem;
            color: var(--text-light);
        }

        .contact a {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
        }

        .contact a:hover {
            text-decoration: underline;
        }

        @media (max-width: 480px) {
            .login-card { padding: 2rem 1.5rem; }
            .logo h1 { font-size: 2rem; }
        }