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

        body {
            font-family: 'Segoe UI', sans-serif;
            background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-box {
            background: white;
            border-radius: 20px;
            padding: 40px 35px;
            width: 100%;
            max-width: 420px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
        }

        .login-box .logo {
            width: 65px;
            height: 65px;
            background: #16a34a;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }

        .login-box .logo i {
            font-size: 2rem;
            color: white;
        }

        .login-box h2 {
            text-align: center;
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 5px;
            font-size: 1.5rem;
        }

        .login-box p {
            text-align: center;
            color: #6b7280;
            font-size: 0.9rem;
            margin-bottom: 30px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            color: #374151;
            margin-bottom: 6px;
            font-size: 0.9rem;
        }

        .form-group .input-group {
            position: relative;
        }

        .form-group .input-group i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: #9ca3af;
            font-size: 1.1rem;
            z-index: 10;
        }

        .form-group input {
            width: 100%;
            padding: 13px 14px 13px 42px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 0.95rem;
            transition: all 0.3s;
            background: #f9fafb;
            outline: none;
            color: #1f2937;
        }

        .form-group input:focus {
            border-color: #16a34a;
            box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.08);
            background: white;
        }

        .form-group input::placeholder {
            color: #9ca3af;
        }

        .options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 22px;
            font-size: 0.85rem;
        }

        .options label {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #6b7280;
            cursor: pointer;
        }

        .options label input {
            accent-color: #16a34a;
            width: 16px;
            height: 16px;
        }

        .options a {
            color: #16a34a;
            text-decoration: none;
            font-weight: 500;
        }

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

        .btn-login {
            width: 100%;
            padding: 14px;
            background: #16a34a;
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-login:hover {
            background: #15803d;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(22, 163, 74, 0.3);
        }

        .register-link {
            text-align: center;
            margin-top: 20px;
            color: #6b7280;
            font-size: 0.9rem;
        }

        .register-link a {
            color: #16a34a;
            text-decoration: none;
            font-weight: 600;
        }

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

        .alert {
            padding: 12px 16px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 0.85rem;
        }

        .alert-danger {
            background: #fef2f2;
            color: #dc2626;
            border-left: 4px solid #dc2626;
        }

        .alert-success {
            background: #f0fdf4;
            color: #16a34a;
            border-left: 4px solid #16a34a;
        }

        .alert ul {
            margin: 0;
            padding-left: 18px;
        }